diff --git a/channelcolumn.c b/channelcolumn.c
index c23fbe6..666b6b5 100644
--- a/channelcolumn.c
+++ b/channelcolumn.c
@@ -5,9 +5,15 @@ cChannelColumn::cChannelColumn(int num, const cChannel *channel, cMyTime *myTime
     this->channel = channel;
     this->num = num;
     this->myTime = myTime;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+#else
     hasTimer = channel->HasTimer();
+#endif
     hasSwitchTimer = SwitchTimers.ChannelInSwitchList(channel);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+#else
     schedulesLock = new cSchedulesLock(false, 100);
+#endif
     header = NULL;
 }
 
@@ -15,7 +21,10 @@ cChannelColumn::~cChannelColumn(void) {
     if (header)
         delete header;
     grids.Clear();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+#else
     delete schedulesLock;
+#endif
 }
 
 void cChannelColumn::clearGrids() {
@@ -33,7 +42,12 @@ void cChannelColumn::drawHeader() {
 }
 
 bool cChannelColumn::readGrids() {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_SCHEDULES_READ;
+    const cSchedules* schedules = Schedules;
+#else
     schedules = cSchedules::Schedules(*schedulesLock);
+#endif
     const cSchedule *Schedule = NULL;
     Schedule = schedules->GetSchedule(channel);
     if (!Schedule) {
@@ -186,7 +200,12 @@ void cChannelColumn::AddNewGridsAtStart() {
         return;
     }
     //if not, i have to add new ones to the list
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_SCHEDULES_READ;
+    const cSchedules* schedules = Schedules;
+#else
     schedules = cSchedules::Schedules(*schedulesLock);
+#endif
     const cSchedule *Schedule = NULL;
     Schedule = schedules->GetSchedule(channel);
     if (!Schedule) {
@@ -234,7 +253,12 @@ void cChannelColumn::AddNewGridsAtEnd() {
         return;
     }
     //if not, i have to add new ones to the list
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_SCHEDULES_READ;
+    const cSchedules* schedules = Schedules;
+#else
     schedules = cSchedules::Schedules(*schedulesLock);
+#endif
     const cSchedule *Schedule = NULL;
     Schedule = schedules->GetSchedule(channel);
     if (!Schedule) {
@@ -342,7 +366,10 @@ cGrid *cChannelColumn::addDummyGrid(time_t start, time_t end, cGrid *firstGrid,
 }
 
 void cChannelColumn::SetTimers() {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+#else
     hasTimer = channel->HasTimer();
+#endif
     hasSwitchTimer = SwitchTimers.ChannelInSwitchList(channel);
     for (cGrid *grid = grids.First(); grid; grid = grids.Next(grid)) {
         bool gridHadTimer = grid->HasTimer();
diff --git a/channelcolumn.h b/channelcolumn.h
index 0e1d138..799500f 100644
--- a/channelcolumn.h
+++ b/channelcolumn.h
@@ -20,7 +20,10 @@ private:
     const cChannel *channel;
     cHeaderGrid *header;
     cList<cGrid> grids;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+#else
     cSchedulesLock *schedulesLock;
+#endif
     const cSchedules *schedules;
     bool hasTimer;
     bool hasSwitchTimer;
@@ -50,7 +53,11 @@ public:
     void ClearOutdatedEnd();
     int GetNum() {return num;};
     void SetNum(int num) {this->num = num;};
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    void setTimer();
+#else
     void setTimer() {hasTimer = channel->HasTimer();};
+#endif
     bool HasTimer() { return hasTimer; };
     void setSwitchTimer() {hasSwitchTimer = SwitchTimers.ChannelInSwitchList(channel);};
     bool HasSwitchTimer() { return hasSwitchTimer; };
diff --git a/channelgroups.c b/channelgroups.c
index 6767cee..7046679 100644
--- a/channelgroups.c
+++ b/channelgroups.c
@@ -10,12 +10,21 @@ cChannelGroups::~cChannelGroups(void) {
 void cChannelGroups::ReadChannelGroups(void) {
     bool setStart = false;
     int lastChannelNumber = 0;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cChannel *first = Channels->First();
+#else
     const cChannel *first = Channels.First();
+#endif
     if (!first->GroupSep()) {
         channelGroups.push_back(cChannelGroup(tr("Main Program")));
         setStart = true;
     }    
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    for (const cChannel *channel = Channels->First(); channel; channel = Channels->Next(channel)) {
+#else
     for (const cChannel *channel = Channels.First(); channel; channel = Channels.Next(channel)) {
+#endif
         if (setStart && (channelGroups.size() > 0)) {
             channelGroups[channelGroups.size()-1].SetChannelStart(channel->Number());
             setStart = false;
@@ -103,7 +112,12 @@ void cChannelGroups::DrawChannelGroups(const cChannel *start, const cChannel *st
     int groupLast = group;
     int line = 0;
     int lineStart = 0;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    for (const cChannel *channel = Channels->Next(start); channel; channel = Channels->Next(channel)) {
+#else
     for (const cChannel *channel = Channels.Next(start); channel; channel = Channels.Next(channel)) {
+#endif
         if (channel->GroupSep())
             continue;
         group = GetGroup(channel);
diff --git a/channeljump.c b/channeljump.c
index 58fa77f..8793217 100644
--- a/channeljump.c
+++ b/channeljump.c
@@ -11,7 +11,12 @@ cChannelJump::cChannelJump(cChannelGroups *channelGroups) {
     pixmapText = NULL;
     channel = 0;
 	if (!tvguideConfig.hideLastGroup) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_CHANNELS_READ;
+        maxChannels = Channels->MaxNumber();
+#else
         maxChannels = Channels.MaxNumber();
+#endif
 	} else {
         maxChannels = channelGroups->GetLastValidChannel();
     }
diff --git a/detailview.c b/detailview.c
index ca351ab..12accc3 100644
--- a/detailview.c
+++ b/detailview.c
@@ -9,7 +9,12 @@ cDetailView::~cDetailView(void){
     Cancel(-1);
     while (Active())
         cCondWait::SleepMs(10);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    footer->LeaveDetailedViewMode(Channels->GetByChannelID(event->ChannelID()));
+#else
     footer->LeaveDetailedViewMode(Channels.GetByChannelID(event->ChannelID()));
+#endif
     if (view)
         delete view;
 }
@@ -42,7 +47,12 @@ void cDetailView::InitiateView(void) {
         dateTime = cString::sprintf("%s  %s - %s (%d %s)", *event->GetDateString(), *event->GetTimeString(), *event->GetEndTimeString(), event->Duration()/60, tr("min"));
     }
     view->SetDateTime(*dateTime);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    view->SetChannel(Channels->GetByChannelID(event->ChannelID(), true));
+#else
     view->SetChannel(Channels.GetByChannelID(event->ChannelID(), true));
+#endif
     view->SetEventID(event->EventID());
     view->SetEvent(event);
 }
@@ -90,7 +100,12 @@ std::string cDetailView::LoadReruns(void) {
                     continue;
                 i++;
                 sstrReruns  << *DayDateTime(r->event->StartTime());
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                LOCK_CHANNELS_READ;
+                const cChannel *channel = Channels->GetByChannelID(r->event->ChannelID(), true, true);
+#else
                 cChannel *channel = Channels.GetByChannelID(r->event->ChannelID(), true, true);
+#endif
                 if (channel) {
                     sstrReruns << ", " << trVDR("Channel") << " " << channel->Number() << ":";
                     sstrReruns << " " << channel->ShortName(true);
diff --git a/imagecache.c b/imagecache.c
index eb3117c..5b95e54 100644
--- a/imagecache.c
+++ b/imagecache.c
@@ -280,7 +280,12 @@ void cImageCache::CreateLogoCache(void) {
         return;
     if (tvguideConfig.numLogosInitial > 0) {
         int channelsCached = 0;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_CHANNELS_READ;
+        for (const cChannel *channel = Channels->First(); channel; channel = Channels->Next(channel)) {
+#else
         for (const cChannel *channel = Channels.First(); channel; channel = Channels.Next(channel)) {
+#endif
             if (channelsCached >= tvguideConfig.numLogosInitial)
                 break;
             if (!channel->GroupSep()) {
diff --git a/recmanager.c b/recmanager.c
index 7ad6f4c..3ad735c 100644
--- a/recmanager.c
+++ b/recmanager.c
@@ -10,6 +10,7 @@
 #include "tools.h"
 #include "switchtimer.h"
 #include "timerconflict.h"
+#include <vdr/timers.h>
 #include "recmanager.h"
 
 static int CompareRecording(const void *p1, const void *p2) {
@@ -55,15 +56,27 @@ bool cRecManager::CheckEventForTimer(const cEvent *event) {
     return hasTimer;
 }
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+const cTimer *cRecManager::GetTimerForEvent(const cEvent *event) {
+    const cTimer *timer = NULL;
+#else
 cTimer *cRecManager::GetTimerForEvent(const cEvent *event) {
     cTimer *timer = NULL;
+#endif
     if (tvguideConfig.useRemoteTimers && pRemoteTimers) {
         RemoteTimers_GetMatch_v1_0 rtMatch;
         rtMatch.event = event;
         pRemoteTimers->Service("RemoteTimers::GetMatch-v1.0", &rtMatch);
         timer = rtMatch.timer;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        return timer;
+    }
+        LOCK_TIMERS_READ;
+        timer = Timers->GetMatch(event);
+#else
     } else
         timer = Timers.GetMatch(event);    
+#endif
     return timer;
 }
 
@@ -79,19 +92,36 @@ cTimer *cRecManager::createTimer(const cEvent *event, std::string path) {
 
 cTimer *cRecManager::createLocalTimer(const cEvent *event, std::string path) {
     cTimer *timer = new cTimer(event);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_TIMERS_WRITE;
+    cTimer *t = Timers->GetTimer(timer);
+#else
     cTimer *t = Timers.GetTimer(timer);
+#endif
     if (t) {
         t->OnOff();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        t->SetEvent(event);
+#else
         t->SetEventFromSchedule();
+#endif
         delete timer;
         timer = t;
         isyslog("timer %s reactivated", *t->ToDescr());
     } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        Timers->Add(timer);
+#else
         Timers.Add(timer);
+#endif
         isyslog("timer %s added (active)", *timer->ToDescr());
     }
     SetTimerPath(timer, event, path);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    Timers->SetModified();
+#else
     Timers.SetModified();
+#endif
     return timer;
 }
 
@@ -148,7 +178,12 @@ void cRecManager::SetTimerPath(cTimer *timer, const cEvent *event, std::string p
 }
 
 void cRecManager::DeleteTimer(int timerID) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_TIMERS_READ;
+    const cTimer *t = Timers->Get(timerID);
+#else
     cTimer *t = Timers.Get(timerID);
+#endif
     if (!t)
         return;
     DeleteTimer(t);
@@ -165,21 +200,43 @@ void cRecManager::DeleteTimer(const cEvent *event) {
 }
 
 void cRecManager::DeleteLocalTimer(const cEvent *event) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_TIMERS_READ;
+    const cTimer *t = Timers->GetMatch(event);
+#else
     cTimer *t = Timers.GetMatch(event);
+#endif
     if (!t)
         return;
     DeleteTimer(t);
 }
 
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+void cRecManager::DeleteTimer(const cTimer *timer) {
+    LOCK_TIMERS_WRITE;
+    cTimers* timers = Timers;
+    cTimer* t = timers->GetTimer((cTimer*)timer);  // #TODO dirty cast
+   
+    if (t->Recording()) {
+       t->Skip();
+       cRecordControls::Process(timers, time(NULL));
+    }
+#else
 void cRecManager::DeleteTimer(cTimer *timer) {
     if (timer->Recording()) {
         timer->Skip();
         cRecordControls::Process(time(NULL));
     }
+#endif
     isyslog("timer %s deleted", *timer->ToDescr());
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    timers->Del(t, true);
+    timers->SetModified();
+#else
     Timers.Del(timer, true);
     Timers.SetModified();
+#endif
 }
 
 void cRecManager::DeleteRemoteTimer(const cEvent *event) {
@@ -196,7 +253,11 @@ void cRecManager::DeleteRemoteTimer(const cEvent *event) {
     }
 }
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+void cRecManager::SaveTimer(const cTimer *timer, cTimer newTimerSettings) {
+#else
 void cRecManager::SaveTimer(cTimer *timer, cTimer newTimerSettings) {
+#endif
     if (!timer)
         return;
     
@@ -208,33 +269,63 @@ void cRecManager::SaveTimer(cTimer *timer, cTimer newTimerSettings) {
     int stop = newTimerSettings.Stop();
     std::string fileName = newTimerSettings.File();
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    ((cTimer*)timer)->SetDay(day);
+    ((cTimer*)timer)->SetStart(start);
+    ((cTimer*)timer)->SetStop(stop);
+    ((cTimer*)timer)->SetPriority(prio);
+    ((cTimer*)timer)->SetLifetime(lifetime);
+    ((cTimer*)timer)->SetFile(fileName.c_str());
+#else
     timer->SetDay(day);
     timer->SetStart(start);
     timer->SetStop(stop);
     timer->SetPriority(prio);
     timer->SetLifetime(lifetime);
     timer->SetFile(fileName.c_str());
-    
+#endif
+
     if (timer->HasFlags(tfActive) && !active)
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        ((cTimer*)timer)->ClrFlags(tfActive);
+    else if (!timer->HasFlags(tfActive) && active)
+        ((cTimer*)timer)->SetFlags(tfActive);
+
+#else
         timer->ClrFlags(tfActive);
     else if (!timer->HasFlags(tfActive) && active)
         timer->SetFlags(tfActive);
-    
+
     timer->SetEventFromSchedule();
+#endif
     if (tvguideConfig.useRemoteTimers && pRemoteTimers) {
         RemoteTimers_Timer_v1_0 rt;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        rt.timer = (cTimer*)timer;
+#else
         rt.timer = timer;
+#endif
         if (!pRemoteTimers->Service("RemoteTimers::ModTimer-v1.0", &rt))
             rt.timer = NULL;
         RefreshRemoteTimers();
     } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_TIMERS_WRITE;
+        Timers->SetModified();
+#else
         Timers.SetModified();
+#endif
     }          
 }
 
 
 bool cRecManager::IsRecorded(const cEvent *event) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_TIMERS_WRITE;
+    cTimer *timer = Timers->GetMatch(event);
+#else
     cTimer *timer = Timers.GetMatch(event);
+#endif
     if (!timer)
         return false;
     return timer->Recording();
@@ -260,7 +351,10 @@ cTVGuideTimerConflicts *cRecManager::CheckTimerConflict(void) {
 }
 
 void cRecManager::CreateSeriesTimer(cTimer *seriesTimer) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+#else
     seriesTimer->SetEventFromSchedule();
+#endif
     if (tvguideConfig.useRemoteTimers && pRemoteTimers) {
         RemoteTimers_Timer_v1_0 rt;
         rt.timer = seriesTimer;
@@ -268,8 +362,15 @@ void cRecManager::CreateSeriesTimer(cTimer *seriesTimer) {
             isyslog("%s", *rt.errorMsg);
         RefreshRemoteTimers();
     } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_TIMERS_WRITE;
+        cTimers* timers = Timers;
+        timers->Add(seriesTimer);
+        timers->SetModified();
+#else
         Timers.Add(seriesTimer);
         Timers.SetModified();
+#endif
     }
 }
 
@@ -316,9 +417,14 @@ const cEvent **cRecManager::PerformSearchTimerSearch(std::string epgSearchString
         numResults = results.size();
         if (numResults > 0) {
             searchResults = new const cEvent *[numResults];
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_SCHEDULES_READ;
+            const cSchedules* schedules = Schedules;
+#else
             cSchedulesLock schedulesLock;
             const cSchedules *schedules;
             schedules = cSchedules::Schedules(schedulesLock);
+#endif
             const cEvent *event = NULL;
             int index=0;
             for (std::list<std::string>::iterator it=results.begin(); it != results.end(); ++it) {
@@ -328,7 +434,12 @@ const cEvent **cRecManager::PerformSearchTimerSearch(std::string epgSearchString
                     int eventID = atoi(flds[1].c_str());
                     std::string channelID = flds[7];
                     tChannelID chanID = tChannelID::FromString(channelID.c_str());
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                    LOCK_CHANNELS_READ;
+                    const cChannel *channel = Channels->GetByChannelID(chanID);
+#else
                     cChannel *channel = Channels.GetByChannelID(chanID);
+#endif
                     if (channel) {
                         const cSchedule *Schedule = NULL;
                         Schedule = schedules->GetSchedule(channel);
@@ -435,24 +546,45 @@ void cRecManager::DeleteSearchTimer(cTVGuideSearchTimer *searchTimer, bool delTi
         return;
     int searchTimerID = searchTimer->GetID();
     if (delTimers) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_TIMERS_WRITE;
+        cTimer *timer = Timers->First();
+#else
         cTimer *timer = Timers.First();
+#endif
         while(timer) {
             if (!timer->Recording()) {
                 char* searchID = GetAuxValue(timer, "s-id");
                 if (searchID) {
                     if (searchTimerID == atoi(searchID)) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                        cTimer* timerNext = Timers->Next(timer);
+#else
                         cTimer* timerNext = Timers.Next(timer);
+#endif
                         DeleteTimer(timer);
                         timer = timerNext;
                     } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                        timer = Timers->Next(timer);
+#else
                         timer = Timers.Next(timer);
+#endif
                     }
                     free(searchID);
                 } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                    timer = Timers->Next(timer);
+#else
                     timer = Timers.Next(timer);
+#endif
                 }
             } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                timer = Timers->Next(timer);
+#else
                 timer = Timers.Next(timer);
+#endif
             }
         }
     }
@@ -505,13 +637,24 @@ void cRecManager::DeleteSwitchTimer(const cEvent *event) {
     }
 }
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+const cRecording **cRecManager::SearchForRecordings(std::string searchString, int &numResults) {
+
+    const cRecording **matchingRecordings = NULL;
+#else
 cRecording **cRecManager::SearchForRecordings(std::string searchString, int &numResults) {
     
     cRecording **matchingRecordings = NULL;
+#endif
     int num = 0;
     numResults = 0;
     
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_RECORDINGS_READ;
+    for (const cRecording *recording = Recordings->First(); recording; recording = Recordings->Next(recording)) {
+#else
     for (cRecording *recording = Recordings.First(); recording; recording = Recordings.Next(recording)) {
+#endif
         std::string s1 = recording->Name();
         std::string s2 = searchString;
         if (s1.empty() || s2.empty()) continue;
@@ -542,7 +685,11 @@ cRecording **cRecManager::SearchForRecordings(std::string searchString, int &num
         }
         
         if (match) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            matchingRecordings = (const cRecording **)realloc(matchingRecordings, (num + 1) * sizeof(cRecording *));
+#else
             matchingRecordings = (cRecording **)realloc(matchingRecordings, (num + 1) * sizeof(cRecording *));
+#endif
             matchingRecordings[num++] = recording;
         }
     }
@@ -619,10 +766,26 @@ void cRecManager::GetFavorites(std::vector<cTVGuideSearchTimer> *favorites) {
 
 const cEvent **cRecManager::WhatsOnNow(bool nowOrNext, int &numResults) {
     std::vector<const cEvent*> tmpResults;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_SCHEDULES_READ;
+    LOCK_CHANNELS_READ;
+    const cChannels* channels = Channels;
+    const cSchedules* schedules = Schedules;
+#else
     cSchedulesLock schedulesLock;
     const cSchedules *schedules = cSchedules::Schedules(schedulesLock);
+#endif
     const cChannel *startChannel = NULL, *stopChannel = NULL;
     if (tvguideConfig.favLimitChannels) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        startChannel = Channels->GetByNumber(tvguideConfig.favStartChannel);
+        stopChannel = Channels->GetByNumber(tvguideConfig.favStopChannel);
+    }
+    if (!startChannel)
+        startChannel = Channels->First();
+
+    for (const cChannel *channel = startChannel; channel; channel = Channels->Next(channel)) {
+#else
         startChannel = Channels.GetByNumber(tvguideConfig.favStartChannel);
         stopChannel = Channels.GetByNumber(tvguideConfig.favStopChannel);
     }
@@ -630,6 +793,7 @@ const cEvent **cRecManager::WhatsOnNow(bool nowOrNext, int &numResults) {
         startChannel = Channels.First();
 
     for (const cChannel *channel = startChannel; channel; channel = Channels.Next(channel)) {
+#endif
         if (channel->GroupSep()) continue;
         const cSchedule *Schedule = schedules->GetSchedule(channel);
         if (!Schedule) continue;
@@ -679,10 +843,26 @@ const cEvent **cRecManager::UserDefinedTime(int userTime, int &numResults) {
     if (searchTime < now)
         searchTime += 24*60*60;
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    LOCK_SCHEDULES_READ;
+    const cChannels* channels = Channels;
+    const cSchedules* schedules = Schedules;
+#else
     cSchedulesLock schedulesLock;
     const cSchedules *schedules = cSchedules::Schedules(schedulesLock);
+#endif
     const cChannel *startChannel = NULL, *stopChannel = NULL;
     if (tvguideConfig.favLimitChannels) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        startChannel = Channels->GetByNumber(tvguideConfig.favStartChannel);
+        stopChannel = Channels->GetByNumber(tvguideConfig.favStopChannel);
+    }
+    if (!startChannel)
+        startChannel = Channels->First();
+
+    for (const cChannel *channel = startChannel; channel; channel = Channels->Next(channel)) {
+#else
         startChannel = Channels.GetByNumber(tvguideConfig.favStartChannel);
         stopChannel = Channels.GetByNumber(tvguideConfig.favStopChannel);
     }
@@ -690,6 +870,7 @@ const cEvent **cRecManager::UserDefinedTime(int userTime, int &numResults) {
         startChannel = Channels.First();
 
     for (const cChannel *channel = startChannel; channel; channel = Channels.Next(channel)) {
+#endif
         if (channel->GroupSep()) continue;
         const cSchedule *Schedule = schedules->GetSchedule(channel);
         if (!Schedule) continue;
diff --git a/recmanager.h b/recmanager.h
index a144071..53b8146 100644
--- a/recmanager.h
+++ b/recmanager.h
@@ -28,17 +28,29 @@ public:
     bool EpgSearchAvailable(void) {return epgSearchAvailable;};
     bool RefreshRemoteTimers(void);
     bool CheckEventForTimer(const cEvent *event);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cTimer *GetTimerForEvent(const cEvent *event);
+#else
     cTimer *GetTimerForEvent(const cEvent *event);
+#endif
     cTimer *createTimer(const cEvent *event, std::string path = "");
     cTimer *createLocalTimer(const cEvent *event, std::string path);
     cTimer *createRemoteTimer(const cEvent *event, std::string path);
     void SetTimerPath(cTimer *timer, const cEvent *event, std::string path);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    void DeleteTimer(const cTimer *timer);
+#else
     void DeleteTimer(cTimer *timer);
+#endif
     void DeleteTimer(int timerID);
     void DeleteTimer(const cEvent *event);
     void DeleteLocalTimer(const cEvent *event);
     void DeleteRemoteTimer(const cEvent *event);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    void SaveTimer(const cTimer *timer, cTimer newTimerSettings);
+#else
     void SaveTimer(cTimer *timer, cTimer newTimerSettings);
+#endif
     bool IsRecorded(const cEvent *event);
     cTVGuideTimerConflicts *CheckTimerConflict(void);
     void CreateSeriesTimer(cTimer *seriesTimer);
@@ -52,7 +64,11 @@ public:
     void UpdateSearchTimers(void);
     bool CreateSwitchTimer(const cEvent *event, cSwitchTimer switchTimer);
     void DeleteSwitchTimer(const cEvent *event);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cRecording **SearchForRecordings(std::string searchString, int &numResults);
+#else
     cRecording **SearchForRecordings(std::string searchString, int &numResults);
+#endif
     const cEvent **LoadReruns(const cEvent *event, int &numResults);
     void GetFavorites(std::vector<cTVGuideSearchTimer> *favorites);
     const cEvent **WhatsOnNow(bool nowOrNext, int &numResults);
diff --git a/recmenuitem.c b/recmenuitem.c
index 6e4d31f..c45a317 100644
--- a/recmenuitem.c
+++ b/recmenuitem.c
@@ -1817,7 +1817,12 @@ void cRecMenuItemEvent::Draw(void) {
     if (!event)
         return;
     int logoX = DrawIcons();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cChannel *channel = Channels->GetByChannelID(event->ChannelID());
+#else
     const cChannel *channel = Channels.GetByChannelID(event->ChannelID());
+#endif
     cString channelName = "";
     if (channel)
         channelName = channel->Name();
@@ -1913,7 +1918,11 @@ eRecMenuState cRecMenuItemEvent::ProcessKey(eKeys Key) {
 
 // --- cRecMenuItemChannelChooser -------------------------------------------------------
 cRecMenuItemChannelChooser::cRecMenuItemChannelChooser(cString text,
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                                                       const cChannel *initialChannel,
+#else
                                                        cChannel *initialChannel,
+#endif
                                                        bool active,
                                                        int *callback,
                                                        eRecMenuState action) {
@@ -1998,15 +2007,29 @@ eRecMenuState cRecMenuItemChannelChooser::ProcessKey(eKeys Key) {
             fresh = true;
             if (!channel)
                 return rmsConsumed;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            const cChannel *prev = channel;
+            LOCK_CHANNELS_READ;
+            const cChannel *firstChannel = Channels->First();
+#else
             cChannel *prev = channel;
             cChannel *firstChannel = Channels.First();
+#endif
             if(firstChannel->GroupSep())
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                firstChannel = Channels->Next(firstChannel);
+#else
                 firstChannel = Channels.Next(firstChannel);
+#endif
             if (prev == firstChannel) {
                 if (!initialChannelSet)
                     channel = NULL;
             } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                while (prev = Channels->Prev(prev)) {
+#else
                 while (prev = Channels.Prev(prev)) {
+#endif
                     if(!prev->GroupSep()) {
                         channel = prev;
                         break;
@@ -2023,14 +2046,30 @@ eRecMenuState cRecMenuItemChannelChooser::ProcessKey(eKeys Key) {
             return rmsConsumed;
             break; }
         case kRight: {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_CHANNELS_READ;
+#endif
             fresh = true;
             if (!channel) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                channel = Channels->First();
+#else
                 channel = Channels.First();
+#endif
                 if(channel->GroupSep())
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                    channel = Channels->Next(channel);
+#else
                     channel = Channels.Next(channel);
+#endif
             } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                const cChannel *next = channel;
+                while (next = Channels->Next(next)) {
+#else
                 cChannel *next = channel;
                 while (next = Channels.Next(next)) {
+#endif
                     if(!next->GroupSep()) {
                         channel = next;
                         break;
@@ -2052,7 +2091,12 @@ eRecMenuState cRecMenuItemChannelChooser::ProcessKey(eKeys Key) {
                fresh = false;
             }
             channelNumber = channelNumber * 10 + (Key - k0);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_CHANNELS_READ;
+            const cChannel *chanNew = Channels->GetByNumber(channelNumber);
+#else
             cChannel *chanNew = Channels.GetByNumber(channelNumber);
+#endif
             if (chanNew) {
                 channel = chanNew;
                 DrawValue();
@@ -2214,7 +2258,11 @@ eRecMenuState cRecMenuItemDayChooser::ProcessKey(eKeys Key) {
 }
 
 // --- cRecMenuItemRecording  -------------------------------------------------------
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+cRecMenuItemRecording::cRecMenuItemRecording(const cRecording *recording, bool active) {
+#else
 cRecMenuItemRecording::cRecMenuItemRecording(cRecording *recording, bool active) {
+#endif
     selectable = true;
     this->recording = recording;
     this->active = active;
@@ -2242,7 +2290,12 @@ void cRecMenuItemRecording::Draw(void) {
     if (!recording)
         return;
     const cRecordingInfo *recInfo = recording->Info();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cChannel *channel = Channels->GetByChannelID(recInfo->ChannelID());
+#else
     cChannel *channel = Channels.GetByChannelID(recInfo->ChannelID());
+#endif
     cString channelName = tr("unknown channel");
     if (channel)
         channelName = channel->Name();
@@ -2457,7 +2510,11 @@ void cRecMenuItemTimelineHeader::Show(void) {
 
 
 // --- cRecMenuItemTimelineTimer  -------------------------------------------------------
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+cRecMenuItemTimelineTimer::cRecMenuItemTimelineTimer(const cTimer *timer, time_t start, time_t stop,  std::vector<cTVGuideTimerConflict*> conflictsToday, cRecMenuItemTimelineHeader *header, bool active) {
+#else
 cRecMenuItemTimelineTimer::cRecMenuItemTimelineTimer(cTimer *timer, time_t start, time_t stop,  std::vector<cTVGuideTimerConflict*> conflictsToday, cRecMenuItemTimelineHeader *header, bool active) {
+#endif
     conflicts = conflictsToday;
     defaultBackground = false;
     pixmapBack = NULL;
@@ -2604,7 +2661,11 @@ void cRecMenuItemTimelineTimer::Show(void) {
     if (pixmapTimerConflicts) pixmapTimerConflicts->SetLayer(6);
 }
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+const cTimer *cRecMenuItemTimelineTimer::GetTimerValue(void) {
+#else
 cTimer *cRecMenuItemTimelineTimer::GetTimerValue(void) {
+#endif
     return timer;    
 }
 
diff --git a/recmenuitem.h b/recmenuitem.h
index 9df37db..2f9106a 100644
--- a/recmenuitem.h
+++ b/recmenuitem.h
@@ -123,7 +123,11 @@ public:
     virtual bool GetBoolValue(void) { return false; };
     virtual cString GetStringValue(void) { return cString(""); };
     virtual const cEvent *GetEventValue(void) { return NULL; };
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    virtual const cTimer *GetTimerValue(void) { return NULL; };
+#else
     virtual cTimer *GetTimerValue(void) { return NULL; };
+#endif
     virtual eRecMenuState ProcessKey(eKeys Key) { return rmsNotConsumed; };
 };
 
@@ -489,7 +493,11 @@ public:
 class cRecMenuItemChannelChooser : public cRecMenuItem {
 private:
     cString text;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cChannel *channel;
+#else
     cChannel *channel;
+#endif
     int channelNumber;
     int *callback;
     bool initialChannelSet;
@@ -498,7 +506,11 @@ private:
     void DrawValue(void);
 public:
     cRecMenuItemChannelChooser (cString text,
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                                const cChannel *initialChannel,
+#else
                                 cChannel *initialChannel,
+#endif
                                 bool active = false,
                                 int *callback = NULL,
                                 eRecMenuState action = rmsNotConsumed);
@@ -548,10 +560,18 @@ public:
 // --- cRecMenuItemRecording  -------------------------------------------------------
 class cRecMenuItemRecording : public cRecMenuItem {
 private:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cRecording *recording;
+#else
     cRecording *recording;
+#endif
     cPixmap *pixmapText;
 public:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    cRecMenuItemRecording(const cRecording *recording, bool active);
+#else
     cRecMenuItemRecording(cRecording *recording, bool active);
+#endif
     virtual ~cRecMenuItemRecording(void);
     void SetPixmaps(void);
     void Hide(void);
@@ -563,7 +583,11 @@ public:
 class cRecMenuItemTimelineHeader : public cRecMenuItem {
 private:
     time_t day;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cTimer *timer;
+#else
     cTimer *timer;
+#endif
     std::vector<cTVGuideTimerConflict*> conflicts;
     cPixmap *pixmapTimeline;
     cPixmap *pixmapTimerInfo;
@@ -579,7 +603,11 @@ public:
     virtual ~cRecMenuItemTimelineHeader(void);
     void SetDay(time_t day) { this->day = day; };
     void SetPixmaps(void);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    void SetCurrentTimer(const cTimer *timer) { this->timer = timer; };
+#else
     void SetCurrentTimer(cTimer *timer) { this->timer = timer; };
+#endif
     void UnsetCurrentTimer(void) { timer = NULL; };
     void RefreshTimerDisplay(void);
     void Hide(void);
@@ -590,7 +618,11 @@ public:
 // --- cRecMenuItemTimelineTimer  -------------------------------------------------------
 class cRecMenuItemTimelineTimer : public cRecMenuItem {
 private:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cTimer *timer;
+#else
     cTimer *timer;
+#endif
     std::vector<cTVGuideTimerConflict*> conflicts;
     cPixmap *pixmapBack;
     cPixmap *pixmapTimerConflicts;
@@ -605,7 +637,11 @@ private:
     void DrawTimerConflicts(void);
     void DrawNoTimerInfo(void);
 public:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    cRecMenuItemTimelineTimer(const cTimer *timer, time_t start, time_t stop, std::vector<cTVGuideTimerConflict*> conflictsToday, cRecMenuItemTimelineHeader *header, bool active);
+#else
     cRecMenuItemTimelineTimer(cTimer *timer, time_t start, time_t stop, std::vector<cTVGuideTimerConflict*> conflictsToday, cRecMenuItemTimelineHeader *header, bool active);
+#endif
     virtual ~cRecMenuItemTimelineTimer(void);
     void setActive(void);
     void setInactive(void);
@@ -613,7 +649,11 @@ public:
     void Hide(void);
     void Show(void); 
     void Draw(void);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cTimer *GetTimerValue(void);
+#else
     cTimer *GetTimerValue(void);
+#endif
     eRecMenuState ProcessKey(eKeys Key);
 };
 
diff --git a/recmenumanager.c b/recmenumanager.c
index edabf4d..cb4bf12 100644
--- a/recmenumanager.c
+++ b/recmenumanager.c
@@ -125,7 +125,12 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
                 timerIndex = menu->GetTimerConflictIndex();
             } else break;
             int timerID = timerConflicts->GetCurrentConflictTimerID(timerIndex);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_TIMERS_READ;
+            const cTimer *t = Timers->Get(timerID);
+#else
             cTimer *t = Timers.Get(timerID);
+#endif
             if (t) {
                 const cEvent *ev = t->Event();
                 if (ev) {
@@ -156,7 +161,12 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
                 timerIndex = menu->GetTimerConflictIndex();
             } else break;
             int timerID = timerConflicts->GetCurrentConflictTimerID(timerIndex);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_TIMERS_READ;
+            const cTimer *timer = Timers->Get(timerID);
+#else
             cTimer *timer = Timers.Get(timerID);
+#endif
             if (timer) {
                 delete activeMenu;
                 activeMenu = new cRecMenuEditTimer(timer, rmsSaveTimerConflictMenu);
@@ -167,7 +177,11 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
             //caller: cRecMenuEditTimer
             //save timer from current timer conflict
             cTimer timerModified;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            const cTimer *originalTimer;
+#else
             cTimer *originalTimer;
+#endif
             if (cRecMenuEditTimer *menu = dynamic_cast<cRecMenuEditTimer*>(activeMenu)) {
                 timerModified = menu->GetTimer();
                 originalTimer = menu->GetOriginalTimer();
@@ -200,7 +214,12 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
             break;
         case rmsEditTimer: {
             //edit timer for active event
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_TIMERS_READ;
+            const cTimer *timer = recManager->GetTimerForEvent(event);
+#else
             cTimer *timer = recManager->GetTimerForEvent(event);
+#endif
             if (timer) {
                 delete activeMenu;
                 activeMenu = new cRecMenuEditTimer(timer, rmsSaveTimer);
@@ -211,7 +230,11 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
             //caller: cRecMenuEditTimer
             //save timer for active event
             cTimer timerModified;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            const cTimer *originalTimer;
+#else
             cTimer *originalTimer;
+#endif
             if (cRecMenuEditTimer *menu = dynamic_cast<cRecMenuEditTimer*>(activeMenu)) {
                 timerModified = menu->GetTimer();
                 originalTimer = menu->GetOriginalTimer();
@@ -230,7 +253,12 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
                 recFolder = menu->GetFolder();
             }
             delete activeMenu;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_CHANNELS_READ;
+            const cChannel *channel = Channels->GetByChannelID(event->ChannelID());
+#else
             cChannel *channel = Channels.GetByChannelID(event->ChannelID());
+#endif
             activeMenu = new cRecMenuSeriesTimer(channel, event, recFolder);
             activeMenu->Display();
             break; }
@@ -472,7 +500,11 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
                 activeMenu = new cRecMenuRecordingSearch(searchString);
             } else {
                 int numSearchResults = 0;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                const cRecording **searchResult = recManager->SearchForRecordings(searchString, numSearchResults);
+#else
                 cRecording **searchResult = recManager->SearchForRecordings(searchString, numSearchResults);
+#endif
                 if (numSearchResults == 0) {
                     activeMenu = new cRecMenuRecordingSearchNotFound(searchString);
                 } else {
@@ -606,7 +638,12 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
                 timerConflict = menu->GetTimerConflictIndex();
             } else break;
             int timerID = timerConflicts->GetCurrentConflictTimerID(timerConflict);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_TIMERS_READ;
+            const cTimer *timer = Timers->Get(timerID);
+#else
             cTimer *timer = Timers.Get(timerID);
+#endif
             if (timer) {
                 const cEvent *event = timer->Event();
                 if (event) {
@@ -648,7 +685,12 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
                 originalConflictIndex = menu->GetTimerConflictIndex();
             } else break;
             int originalTimerID = timerConflicts->GetCurrentConflictTimerID(originalConflictIndex);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_TIMERS_READ;
+            const cTimer *timerOriginal = Timers->Get(originalTimerID);
+#else
             cTimer *timerOriginal = Timers.Get(originalTimerID);
+#endif
             if (replace && timerOriginal) {
                 recManager->DeleteTimer(timerOriginal->Event());
                 recManager->createTimer(replace);
@@ -674,7 +716,11 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
             activeMenu->Display();
             break; } 
         case rmsTimelineTimerEdit: {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            const cTimer *timer;
+#else
             cTimer *timer;
+#endif
             if (cRecMenuTimeline *menu = dynamic_cast<cRecMenuTimeline*>(activeMenu)) {
                 timer = menu->GetTimer();
             } else break;
@@ -686,7 +732,11 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
             break;}
         case rmsTimelineTimerSave: {
             cTimer timerModified;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            const cTimer *originalTimer;
+#else
             cTimer *originalTimer;
+#endif
             if (cRecMenuEditTimer *menu = dynamic_cast<cRecMenuEditTimer*>(activeMenu)) {
                 timerModified = menu->GetTimer();
                 originalTimer = menu->GetOriginalTimer();
@@ -701,7 +751,11 @@ eOSState cRecMenuManager::StateMachine(eRecMenuState nextState) {
             activeMenu->Display();
             break; }
         case rmsTimelineTimerDelete: {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            const cTimer *timer;
+#else
             cTimer *timer;
+#endif
             if (cRecMenuEditTimer *menu = dynamic_cast<cRecMenuEditTimer*>(activeMenu)) {
                 timer = menu->GetOriginalTimer();
             } else break;
@@ -818,9 +872,16 @@ void cRecMenuManager::DisplaySearchTimerList(void) {
     activeMenu->Display();
 }
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+bool cRecMenuManager::DisplayTimerConflict(const cTimer *timer) {
+    int timerID = 0;
+    LOCK_TIMERS_READ;
+    for (const cTimer *t = Timers->First(); t; t = Timers->Next(t)) {
+#else
 bool cRecMenuManager::DisplayTimerConflict(cTimer *timer) {
     int timerID = 0;
     for (cTimer *t = Timers.First(); t; t = Timers.Next(t)) {
+#endif
         if (t == timer)
             return DisplayTimerConflict(timerID);
         timerID++;
diff --git a/recmenumanager.h b/recmenumanager.h
index 9448c12..0cc4455 100644
--- a/recmenumanager.h
+++ b/recmenumanager.h
@@ -23,7 +23,11 @@ private:
     void SetBackground(void);
     void DeleteBackground(void);
     void DisplaySearchTimerList(void);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    bool DisplayTimerConflict(const cTimer *timer);
+#else
     bool DisplayTimerConflict(cTimer *timer);
+#endif
     bool DisplayTimerConflict(int timerID);
     void DisplayDetailedView(const cEvent *ev);
     void DisplayFavoriteResults(std::string header, const cEvent **result, int numResults);
diff --git a/recmenus.c b/recmenus.c
index 701ffd9..51a50b6 100644
--- a/recmenus.c
+++ b/recmenus.c
@@ -105,7 +105,12 @@ std::string cRecMenuAskFolder::GetFolder(void) {
 // --- cRecMenuConfirmTimer  ---------------------------------------------------------
 cRecMenuConfirmTimer::cRecMenuConfirmTimer(const cEvent *event) {
     SetWidthPercent(50);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cString channelName = Channels->GetByChannelID(event->ChannelID())->Name();
+#else
     cString channelName = Channels.GetByChannelID(event->ChannelID())->Name();
+#endif
     cString message;
     bool eventHasTimer = false;
     if (tvguideConfig.useRemoteTimers && pRemoteTimers) {
@@ -143,7 +148,12 @@ cRecMenuConfirmTimer::cRecMenuConfirmTimer(const cEvent *event) {
 // --- cRecMenuConfirmDeleteTimer  ---------------------------------------------------------
 cRecMenuConfirmDeleteTimer::cRecMenuConfirmDeleteTimer(const cEvent *event) {
     SetWidthPercent(50);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cString channelName = Channels->GetByChannelID(event->ChannelID())->Name();
+#else
     cString channelName = Channels.GetByChannelID(event->ChannelID())->Name();
+#endif
     cString text = cString::sprintf("%s\n%s\n%s %s - %s\n%s", 
                                     tr("Timer deleted"), 
                                     *channelName,
@@ -165,7 +175,12 @@ cRecMenuConfirmDeleteTimer::cRecMenuConfirmDeleteTimer(const cEvent *event) {
 // --- cRecMenuAskDeleteTimer ---------------------------------------------------------
 cRecMenuAskDeleteTimer::cRecMenuAskDeleteTimer(const cEvent *event) {
     SetWidthPercent(50);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cString channelName = Channels->GetByChannelID(event->ChannelID())->Name();
+#else
     cString channelName = Channels.GetByChannelID(event->ChannelID())->Name();
+#endif
     cString text = cString::sprintf("%s \"%s, %s\" %s", 
                                     tr("Timer"),
                                     *channelName,
@@ -228,7 +243,12 @@ cRecMenuTimerConflict::cRecMenuTimerConflict(cTVGuideTimerConflict *conflict) {
     SetFooter(new cRecMenuItemButton(tr("Ignore Conflict"), rmsIgnoreTimerConflict, false, true));
     int i=0;
     for(std::vector<int>::iterator it = conflict->timerIDs.begin(); it != conflict->timerIDs.end(); it++) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_TIMERS_READ;
+        const cTimer *timer = Timers->Get(*it);
+#else
         const cTimer *timer = Timers.Get(*it);
+#endif
         if (timer) {
             if (!AddMenuItemInitial(new cRecMenuItemTimer(  timer,
                                                       rmsTimerConflictShowInfo,
@@ -252,7 +272,12 @@ cRecMenuTimerConflict::cRecMenuTimerConflict(cTVGuideTimerConflict *conflict) {
     
 cRecMenuItem *cRecMenuTimerConflict::GetMenuItem(int number) { 
     if ((number >= 0) && (number < conflict->timerIDs.size())) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_TIMERS_READ;
+        const cTimer *timer = Timers->Get(conflict->timerIDs[number]);
+#else
         const cTimer *timer = Timers.Get(conflict->timerIDs[number]);
+#endif
         cRecMenuItem *result = new cRecMenuItemTimer( timer,
                                                       rmsTimerConflictShowInfo,
                                                       rmsDeleteTimerConflictMenu, 
@@ -353,8 +378,14 @@ cRecMenuNoRerunsFound::cRecMenuNoRerunsFound(cString searchString) {
 // --- cRecMenuConfirmRerunUsed  ---------------------------------------------------------
 cRecMenuConfirmRerunUsed::cRecMenuConfirmRerunUsed(const cEvent *original, const cEvent *replace) {
     SetWidthPercent(70);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cString channelOrig = Channels->GetByChannelID(original->ChannelID())->Name();
+    const cString channelReplace = Channels->GetByChannelID(replace->ChannelID())->Name();
+#else
     cString channelOrig = Channels.GetByChannelID(original->ChannelID())->Name();
     cString channelReplace = Channels.GetByChannelID(replace->ChannelID())->Name();
+#endif
     cString message1 = tr("Timer for");
     cString message2 = tr("replaced by rerun");
     cString text = cString::sprintf("%s\n\"%s\", %s %s, %s\n%s\n\"%s\", %s %s, %s", 
@@ -378,7 +409,12 @@ cRecMenuConfirmRerunUsed::cRecMenuConfirmRerunUsed(const cEvent *original, const
 }
 
 // --- cRecMenuEditTimer  ---------------------------------------------------------
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+cRecMenuEditTimer::cRecMenuEditTimer(const cTimer *timer, eRecMenuState nextState) {
+    const cTimer *originalTimer;
+#else
 cRecMenuEditTimer::cRecMenuEditTimer(cTimer *timer, eRecMenuState nextState) {
+#endif
     SetWidthPercent(70);
     if (!timer)
         return;
@@ -435,7 +471,11 @@ cRecMenuEditTimer::cRecMenuEditTimer(cTimer *timer, eRecMenuState nextState) {
     Arrange();
 }
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+const cTimer *cRecMenuEditTimer::GetOriginalTimer(void) {
+#else
 cTimer *cRecMenuEditTimer::GetOriginalTimer(void) {
+#endif
     return originalTimer;
 }
 
@@ -473,7 +513,11 @@ cTimer cRecMenuEditTimer::GetTimer(void) {
 ******************************************************************************************/
 
 // --- cRecMenuSeriesTimer ---------------------------------------------------------
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+cRecMenuSeriesTimer::cRecMenuSeriesTimer(const cChannel *initialChannel, const cEvent *event, std::string folder) {
+#else
 cRecMenuSeriesTimer::cRecMenuSeriesTimer(cChannel *initialChannel, const cEvent *event, std::string folder) {
+#endif
     if (!initialChannel)
         return;
     timerActive = true;
@@ -508,7 +552,12 @@ cRecMenuSeriesTimer::cRecMenuSeriesTimer(cChannel *initialChannel, const cEvent
 }
 
 cTimer *cRecMenuSeriesTimer::GetTimer(void) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cChannel *chan = Channels->GetByNumber(channel);
+#else
     cChannel *chan = Channels.GetByNumber(channel);
+#endif
     cTimer *seriesTimer = new cTimer(NULL, NULL, chan);
     cString fileName = "TITLE EPISODE";
     if (folder.size() > 0) {
@@ -789,8 +838,14 @@ void cRecMenuSearchTimerEdit::InitMenuItems(void) {
         startChannel = 1;
     if (stopChannel == 0)
         stopChannel = 1;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    useChannelSubMenu.push_back(new cRecMenuItemChannelChooser(tr("Start Channel"), Channels->GetByNumber(startChannel), false, &startChannel, rmsSearchTimerSave));
+    useChannelSubMenu.push_back(new cRecMenuItemChannelChooser(tr("Stop Channel"), Channels->GetByNumber(stopChannel), false, &stopChannel, rmsSearchTimerSave));
+#else
     useChannelSubMenu.push_back(new cRecMenuItemChannelChooser(tr("Start Channel"), Channels.GetByNumber(startChannel), false, &startChannel, rmsSearchTimerSave));
     useChannelSubMenu.push_back(new cRecMenuItemChannelChooser(tr("Stop Channel"), Channels.GetByNumber(stopChannel), false, &stopChannel, rmsSearchTimerSave));
+#endif
 
     useTimeSubMenu.push_back(new cRecMenuItemTime(tr("Start after"), startTime, false, &startTime, rmsSearchTimerSave));
     useTimeSubMenu.push_back(new cRecMenuItemTime(tr("Start before"), stopTime, false, &stopTime, rmsSearchTimerSave));
@@ -1214,7 +1269,12 @@ const cEvent *cRecMenuSearchResults::GetEvent(void) {
 // --- cRecMenuSearchConfirmTimer  ---------------------------------------------------------
 cRecMenuSearchConfirmTimer::cRecMenuSearchConfirmTimer(const cEvent *event, eRecMenuState nextAction) {
     SetWidthPercent(50);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cString channelName = Channels->GetByChannelID(event->ChannelID())->Name();
+#else
     cString channelName = Channels.GetByChannelID(event->ChannelID())->Name();
+#endif
     cString message = tr("Timer created");
     cString text = cString::sprintf("%s\n%s\n%s %s - %s\n%s", 
                                     *message, 
@@ -1279,7 +1339,11 @@ cRecMenuRecordingSearch::cRecMenuRecordingSearch(std::string search) {
 }
 
 // --- cRecMenuRecordingSearchResults  ---------------------------------------------------------
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+cRecMenuRecordingSearchResults::cRecMenuRecordingSearchResults(std::string searchString, const cRecording **searchResults, int numResults) {
+#else
 cRecMenuRecordingSearchResults::cRecMenuRecordingSearchResults(std::string searchString, cRecording **searchResults, int numResults) {
+#endif
     this->searchString = searchString;
     this->searchResults = searchResults;
     SetWidthPercent(80);
@@ -1363,7 +1427,13 @@ void cRecMenuTimeline::SetStartStop(void) {
 
 void cRecMenuTimeline::GetTimersForDay(void) {
     timersToday.clear();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_TIMERS_READ;
+    const cTimers* timers = Timers;
+    for (const cTimer *t = Timers->First(); t; t = Timers->Next(t)) {
+#else
     for (cTimer *t = Timers.First(); t; t = Timers.Next(t)) {
+#endif
         if (((t->StartTime() > timeStart) && (t->StartTime() <= timeStop)) || ((t->StopTime() > timeStart) && (t->StopTime() <= timeStop))) {
             timersToday.push_back(t);
         }
@@ -1437,7 +1507,11 @@ void cRecMenuTimeline::ClearMenu(void) {
     header->UnsetCurrentTimer();
 }
 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+const cTimer *cRecMenuTimeline::GetTimer(void) {
+#else
 cTimer *cRecMenuTimeline::GetTimer(void) {
+#endif
     if (cRecMenuItemTimelineTimer *activeItem = dynamic_cast<cRecMenuItemTimelineTimer*>(GetActiveMenuItem()))
         return activeItem->GetTimerValue();
     return NULL;
diff --git a/recmenus.h b/recmenus.h
index 547eee3..7031280 100644
--- a/recmenus.h
+++ b/recmenus.h
@@ -115,7 +115,11 @@ public:
 // --- cRecMenuEditTimer  ---------------------------------------------------------
 class cRecMenuEditTimer: public cRecMenu {
 private:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cTimer *originalTimer;
+#else
     cTimer *originalTimer;
+#endif
     bool timerActive;
     time_t day;
     int start;
@@ -124,10 +128,15 @@ private:
     int lifetime;
     char folder[TEXTINPUTLENGTH];
 public:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    cRecMenuEditTimer(const cTimer *timer, eRecMenuState nextState);
+    const cTimer *GetOriginalTimer(void);
+#else
     cRecMenuEditTimer(cTimer *timer, eRecMenuState nextState);
+    cTimer *GetOriginalTimer(void);
+#endif
     virtual ~cRecMenuEditTimer(void) {};
     cTimer GetTimer(void);
-    cTimer *GetOriginalTimer(void);
 };
 
 /******************************************************************************************
@@ -148,7 +157,11 @@ class cRecMenuSeriesTimer: public cRecMenu {
     int lifetime;
     void CalculateTimes(const cEvent *event);
 public:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    cRecMenuSeriesTimer(const cChannel *initialChannel, const cEvent *event, std::string folder);
+#else
     cRecMenuSeriesTimer(cChannel *initialChannel, const cEvent *event, std::string folder);
+#endif
     virtual ~cRecMenuSeriesTimer(void) {};
     cTimer *GetTimer(void);
 };
@@ -412,10 +425,18 @@ public:
 class cRecMenuRecordingSearchResults: public cRecMenu {
 private:
     std::string searchString;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cRecording **searchResults;
+#else
     cRecording **searchResults;
+#endif
     int numResults;
 public:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    cRecMenuRecordingSearchResults(std::string searchString, const cRecording **searchResults, int numResults);
+#else
     cRecMenuRecordingSearchResults(std::string searchString, cRecording **searchResults, int numResults);
+#endif
     cRecMenuItem *GetMenuItem(int number);
     int GetTotalNumMenuItems(void);
     virtual ~cRecMenuRecordingSearchResults(void) {
@@ -438,7 +459,11 @@ public:
 // --- cRecMenuTimeline  ---------------------------------------------------------
 class cRecMenuTimeline: public cRecMenu {
 private:
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    std::vector<const cTimer*> timersToday;
+#else
     std::vector<cTimer*> timersToday;
+#endif
     int numTimersToday;
     time_t today;
     time_t timeStart;
@@ -459,7 +484,11 @@ public:
     virtual ~cRecMenuTimeline(void) {
     };
     eRecMenuState ProcessKey(eKeys Key);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cTimer *GetTimer(void);
+#else
     cTimer *GetTimer(void);
+#endif
 };
 
 /******************************************************************************************
diff --git a/searchtimer.c b/searchtimer.c
index 7e9b4db..1af3f86 100644
--- a/searchtimer.c
+++ b/searchtimer.c
@@ -16,8 +16,14 @@ cTVGuideSearchTimer::cTVGuideSearchTimer(void) {
     startTime = 0000;
     stopTime = 2359;
     useChannel = false;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    channelMin = Channels->GetByNumber(cDevice::CurrentChannel());
+    channelMax = Channels->GetByNumber(cDevice::CurrentChannel());
+#else
     channelMin = Channels.GetByNumber(cDevice::CurrentChannel());
     channelMax = Channels.GetByNumber(cDevice::CurrentChannel());
+#endif
     channelGroup = "";
     useCase = false;
     mode = 0;
@@ -239,7 +245,12 @@ bool cTVGuideSearchTimer::Parse(bool readTemplate) {
                     char *channelMinbuffer = NULL;
                     char *channelMaxbuffer = NULL;
                     int channels = sscanf(values[value].c_str(), "%a[^|]|%a[^|]", &channelMinbuffer, &channelMaxbuffer);
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                    LOCK_CHANNELS_READ;
+                    channelMin = Channels->GetByChannelID(tChannelID::FromString(channelMinbuffer), true, true);
+#else
                     channelMin = Channels.GetByChannelID(tChannelID::FromString(channelMinbuffer), true, true);
+#endif
                     if (!channelMin) {
                     	channelMin = channelMax = NULL;
                         useChannel = 0;
@@ -247,7 +258,11 @@ bool cTVGuideSearchTimer::Parse(bool readTemplate) {
                     if (channels == 1)
                         channelMax = channelMin;
                     else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+                        channelMax = Channels->GetByChannelID(tChannelID::FromString(channelMaxbuffer), true, true);
+#else
                         channelMax = Channels.GetByChannelID(tChannelID::FromString(channelMaxbuffer), true, true);
+#endif
                         if (!channelMax) {
                             channelMin = channelMax = NULL;
                             useChannel = 0;
@@ -511,7 +526,12 @@ int cTVGuideSearchTimer::GetNumTimers(void) {
     int numTimers = 0;
     if (ID < 0)
     	return numTimers;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_TIMERS_READ;
+    for (const cTimer *timer = Timers->First(); timer; timer = Timers->Next(timer)) {
+#else
     for (cTimer *timer = Timers.First(); timer; timer = Timers.Next(timer)) {
+#endif
         char* searchID = GetAuxValue(timer, "s-id");
         if (!searchID) continue;
       	if (ID == atoi(searchID))
@@ -525,7 +545,12 @@ int cTVGuideSearchTimer::GetNumRecordings(void) {
     int numRecordings = 0;
     if (ID < 0)
         return numRecordings;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_RECORDINGS_READ;
+    for (const cRecording *recording = Recordings->First(); recording; recording = Recordings->Next(recording)) {
+#else
     for (cRecording *recording = Recordings.First(); recording; recording = Recordings.Next(recording)) {
+#endif
         if (recording->IsEdited()) 
             continue;
         if (!recording->Info()) 
@@ -568,3 +593,22 @@ void cTVGuideSearchTimer::Dump(void) {
     esyslog("tvguide searchtimer: useDescription: %d", useDescription);
 }
 
+void cTVGuideSearchTimer::SetStartChannel(int startChannel)
+{
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+   LOCK_CHANNELS_READ;
+   channelMin = Channels->GetByNumber(startChannel);
+#else
+   channelMin = Channels.GetByNumber(startChannel);
+#endif
+};
+
+void cTVGuideSearchTimer::SetStopChannel(int stopChannel)
+{
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+   LOCK_CHANNELS_READ;
+   channelMax = Channels->GetByNumber(stopChannel);
+#else
+   channelMax = Channels.GetByNumber(stopChannel);
+#endif
+};
diff --git a/searchtimer.h b/searchtimer.h
index f797ebd..f9ed924 100644
--- a/searchtimer.h
+++ b/searchtimer.h
@@ -11,8 +11,13 @@ private:
     int         startTime;
     int      	stopTime;
     int         useChannel;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    const cChannel    *channelMin;
+    const cChannel    *channelMax;
+#else
     cChannel 	*channelMin;
     cChannel 	*channelMax;
+#endif
     std::string channelGroup;
     int      	useCase;
     int      	mode;
@@ -106,8 +111,8 @@ public:
     void SetUseSubtitle(bool useSubtitle) { this->useSubtitle = useSubtitle; };
     void SetUseDesription(bool useDescription) { this->useDescription = useDescription; };
     void SetUseChannel(bool useChannel) { this->useChannel = useChannel; };
-    void SetStartChannel(int startChannel) { channelMin = Channels.GetByNumber(startChannel); };
-    void SetStopChannel(int stopChannel) { channelMax = Channels.GetByNumber(stopChannel); };
+    void SetStartChannel(int startChannel);
+    void SetStopChannel(int stopChannel);
     void SetUseTime(bool useTime) { this->useTime = useTime; };
     void SetStartTime(int startTime) { this->startTime = startTime; };
     void SetStopTime(int stopTime) { this->stopTime = stopTime; };
diff --git a/timerconflict.c b/timerconflict.c
index e2a1fee..79f2ce4 100644
--- a/timerconflict.c
+++ b/timerconflict.c
@@ -86,7 +86,12 @@ void cTVGuideTimerConflicts::CalculateConflicts(void) {
         cTimeInterval *unionSet = NULL;
         int numTimers = conflicts[i]->timerIDs.size();
         for (int j=0; j < numTimers; j++) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_TIMERS_READ;
+            const cTimer *timer = Timers->Get(conflicts[i]->timerIDs[j]);
+#else
             const cTimer *timer = Timers.Get(conflicts[i]->timerIDs[j]);
+#endif
             if (timer) {
                 if (!unionSet) {
                     unionSet = new cTimeInterval(timer->StartTime(), timer->StopTime());
@@ -105,7 +110,12 @@ void cTVGuideTimerConflicts::CalculateConflicts(void) {
         
         cTimeInterval *intersect = NULL;
         for (int j=0; j < numTimers; j++) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_TIMERS_READ;
+            const cTimer *timer = Timers->Get(conflicts[i]->timerIDs[j]);
+#else
             const cTimer *timer = Timers.Get(conflicts[i]->timerIDs[j]);
+#endif
             if (timer) {
                 if (!intersect) {
                     intersect = new cTimeInterval(timer->StartTime(), timer->StopTime());
diff --git a/tvguideosd.c b/tvguideosd.c
index 9770d82..8ac19af 100644
--- a/tvguideosd.c
+++ b/tvguideosd.c
@@ -73,11 +73,20 @@ void cTvGuideOsd::Show(void) {
 
 void cTvGuideOsd::drawOsd() {
     cPixmap::Lock();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    const cChannel *startChannel = Channels->GetByNumber(cDevice::CurrentChannel());
+#else
     cChannel *startChannel = Channels.GetByNumber(cDevice::CurrentChannel());
+#endif
     int numBack = tvguideConfig.numGrids / 2;
     int offset = 0;
     const cChannel *newStartChannel = startChannel;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    for (; newStartChannel ; newStartChannel = Channels->Prev(newStartChannel)) {
+#else
     for (; newStartChannel ; newStartChannel = Channels.Prev(newStartChannel)) {
+#endif
         if (newStartChannel && !newStartChannel->GroupSep()) {
             offset++;
         }
@@ -85,7 +94,11 @@ void cTvGuideOsd::drawOsd() {
             break;
     }
     if (!newStartChannel)
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        newStartChannel = Channels->First();
+#else
         newStartChannel = Channels.First();
+#endif
     offset--;
     if (offset < 0)
         offset = 0;
@@ -122,7 +135,12 @@ void cTvGuideOsd::readChannels(const cChannel *channelStart) {
     columns.Clear();
     if (!channelStart)
         return;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_CHANNELS_READ;
+    for (const cChannel *channel = channelStart; channel; channel = Channels->Next(channel)) {
+#else
     for (const cChannel *channel = channelStart; channel; channel = Channels.Next(channel)) {
+#endif
         if (!channel->GroupSep()) {
             if (channelGroups->IsInLastGroup(channel)) {
                 break;
@@ -144,7 +162,11 @@ void cTvGuideOsd::readChannels(const cChannel *channelStart) {
         int numCurrent = columns.Count();
         int numBack = tvguideConfig.numGrids - numCurrent;
         int newChannelNumber = columns.First()->getChannel()->Number() - numBack;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        const cChannel *newStart = Channels->GetByNumber(newChannelNumber);
+#else
         const cChannel *newStart = Channels.GetByNumber(newChannelNumber);
+#endif
         readChannels(newStart);
     }
 }
@@ -213,7 +235,12 @@ void cTvGuideOsd::channelForward() {
     bool colAdded = false;
     if (!colRight) {
         const cChannel *channelRight = activeGrid->column->getChannel();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_CHANNELS_READ;
+        while (channelRight = Channels->Next(channelRight)) {
+#else
         while (channelRight = Channels.Next(channelRight)) {
+#endif
             if (!channelRight->GroupSep()) {
                 if (channelGroups->IsInLastGroup(channelRight)) {
                     break;
@@ -263,7 +290,12 @@ void cTvGuideOsd::channelBack() {
     bool colAdded = false;
     if (!colLeft) {
         const cChannel *channelLeft = activeGrid->column->getChannel();
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_CHANNELS_READ;
+        while (channelLeft = Channels->Prev(channelLeft)) {
+#else
         while (channelLeft = Channels.Prev(channelLeft)) {
+#endif
             if (!channelLeft->GroupSep()) {
                 colLeft = new cChannelColumn(0, channelLeft, myTime);
                 if (colLeft->readGrids()) {
@@ -434,11 +466,21 @@ void cTvGuideOsd::processKeyGreen() {
     if (tvguideConfig.channelJumpMode == eGroupJump) {
         int prevNum = channelGroups->GetPrevGroupChannelNumber(currentChannel);
         if (prevNum) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_CHANNELS_READ;
+            prev = Channels->GetByNumber(prevNum);
+#else
             prev = Channels.GetByNumber(prevNum);
+#endif
         }    
     } else if (tvguideConfig.channelJumpMode == eNumJump) {
         int i = tvguideConfig.jumpChannels + 1;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_CHANNELS_READ;
+        for (const cChannel *channel = firstChannel; channel; channel = Channels->Prev(channel)) {
+#else
         for (const cChannel *channel = firstChannel; channel; channel = Channels.Prev(channel)) {
+#endif
             if (!channel->GroupSep()) {
                 prev = channel;
                 i--;
@@ -470,11 +512,21 @@ void cTvGuideOsd::processKeyYellow() {
     if (tvguideConfig.channelJumpMode == eGroupJump) {
         int nextNum = channelGroups->GetNextGroupChannelNumber(currentChannel);
         if (nextNum) {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+            LOCK_CHANNELS_READ;
+            next = Channels->GetByNumber(nextNum);
+#else
             next = Channels.GetByNumber(nextNum);
+#endif
         }    
     } else if (tvguideConfig.channelJumpMode == eNumJump) {
         int i=0;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_CHANNELS_READ;
+        for (const cChannel *channel = firstChannel; channel; channel = Channels->Next(channel)) {
+#else
         for (const cChannel *channel = firstChannel; channel; channel = Channels.Next(channel)) {
+#endif
             if (channelGroups->IsInLastGroup(channel)) {
                 break;
             }
@@ -625,7 +677,12 @@ void cTvGuideOsd::CheckTimeout(void) {
         int newChannelNum = channelJumper->GetChannel(); 
         delete channelJumper;
         channelJumper = NULL;
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_CHANNELS_READ;
+        const cChannel *newChannel = Channels->GetByNumber(newChannelNum);
+#else
         const cChannel *newChannel = Channels.GetByNumber(newChannelNum);
+#endif
         if (newChannel) {
             readChannels(newChannel);
             if (columns.Count() > 0) {
diff --git a/view.c b/view.c
index 7608c03..485ef36 100644
--- a/view.c
+++ b/view.c
@@ -120,7 +120,12 @@ void cView::DrawHeader(void) {
     pixmapHeader->DrawText(cPoint(xText, ySubtitle), CutText(subTitle, textWidthMax, fontHeader).c_str(), theme.Color(clrFont), theme.Color(clrStatusHeader), fontHeader);
     //REC Icon
     eTimerMatch timerMatch=tmNone; 
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+    LOCK_TIMERS_READ;
+    const cTimer *ti;
+#else
     cTimer *ti;
+#endif
     if (!event)
         return;
     if (tvguideConfig.useRemoteTimers && pRemoteTimers) {
@@ -130,7 +135,12 @@ void cView::DrawHeader(void) {
         timerMatch = (eTimerMatch)rtMatch.timerMatch;
         ti = rtMatch.timer;
     } else {
+#if defined (APIVERSNUM) && (APIVERSNUM >= 20301)
+        LOCK_TIMERS_READ;
+        ti=Timers->GetMatch(event, &timerMatch);
+#else
         ti=Timers.GetMatch(event, &timerMatch);
+#endif
     }
     if (timerMatch == tmFull) {
         cString recIconText(" REC ");