diff --git a/nodes/core/io/21-httpin.js b/nodes/core/io/21-httpin.js
index e00c907cf..099e80e1b 100644
--- a/nodes/core/io/21-httpin.js
+++ b/nodes/core/io/21-httpin.js
@@ -30,7 +30,7 @@ module.exports = function(RED) {
     var urlencParser = express.urlencoded();
 
     function rawBodyParser(req, res, next) {
-        if (req._body) return next();
+        if (req._body) { return next(); }
         req.body = "";
         req._body = true;
         getBody(req, {
@@ -38,7 +38,7 @@ module.exports = function(RED) {
             length: req.headers['content-length'],
             encoding: 'utf8'
         }, function (err, buf) {
-            if (err) return next(err);
+            if (err) { return next(err); }
             req.body = buf;
             next();
         });
@@ -95,10 +95,10 @@ module.exports = function(RED) {
                     }
                 }
                 if (RED.settings.httpNodeCors) {
-                    var routes = RED.httpNode.routes['options'];
-                    for (var i = 0; i<routes.length; i++) {
-                        if (routes[i].path == this.url) {
-                            routes.splice(i,1);
+                    var route = RED.httpNode.route['options'];
+                    for (var j = 0; j<route.length; j++) {
+                        if (route[j].path == this.url) {
+                            route.splice(j,1);
                             //break;
                         }
                     }
@@ -166,7 +166,7 @@ module.exports = function(RED) {
             opts.method = method;
             opts.headers = {};
             if (msg.headers) {
-                for (var v in msg.headers) {
+                for (var v = 0; v < msg.headers.length; v++) {
                     opts.headers[v.toLowerCase()] = msg.headers[v];
                 }
             }
@@ -226,7 +226,7 @@ module.exports = function(RED) {
     RED.httpAdmin.get('/http-request/:id',function(req,res) {
         var credentials = RED.nodes.getCredentials(req.params.id);
         if (credentials) {
-            res.send(JSON.stringify({user:credentials.user,hasPassword:(credentials.password&&credentials.password!="")}));
+            res.send(JSON.stringify({user:credentials.user,hasPassword:(credentials.password&&credentials.password!=="")}));
         } else {
             res.send(JSON.stringify({}));
         }
diff --git a/nodes/core/io/22-websocket.js b/nodes/core/io/22-websocket.js
index 768d09bfe..04fcee1c0 100644
--- a/nodes/core/io/22-websocket.js
+++ b/nodes/core/io/22-websocket.js
@@ -75,7 +75,7 @@ module.exports = function(RED) {
             // Workaround https://github.com/einaros/ws/pull/253
             // Remove listeners from RED.server
             var listener = null;
-            for(var event in node._serverListeners){
+            for (var event = 0; event < node._serverListeners.length; event++) {
                 listener = node._serverListeners[event];
                 if(typeof listener === "function"){
                     RED.server.removeListener(event,listener);
@@ -115,15 +115,19 @@ module.exports = function(RED) {
     }
 
     WebSocketListenerNode.prototype.broadcast = function(data){
-        for(var i in this.server.clients){
+        for (var i = 0; i < this.server.clients.length; i++) {
             this.server.clients[i].send(data);
         }
     }
 
-    WebSocketListenerNode.prototype.send = function(id,data){
+    WebSocketListenerNode.prototype.send = function(id,data) {
         var session = this._clients[id];
         if (session) {
-            session.send(data);
+            try {
+                session.send(data);
+            }
+            catch(e) { // swallow any errors
+            }
         }
     }
 
@@ -167,7 +171,7 @@ module.exports = function(RED) {
                 node.serverConfig.send(msg._session.id,payload);
             } else {
                 node.serverConfig.broadcast(payload,function(error){
-                    if(!!error){
+                    if (!!error) {
                         node.warn("An error occurred while sending:" + inspect(error));
                     }
                 });
diff --git a/nodes/core/io/23-watch.js b/nodes/core/io/23-watch.js
index c4a9ece7e..8a17f5ac2 100644
--- a/nodes/core/io/23-watch.js
+++ b/nodes/core/io/23-watch.js
@@ -24,7 +24,7 @@ module.exports = function(RED) {
         RED.nodes.createNode(this,n);
 
         this.files = n.files.split(",");
-        for (var f in this.files) {
+        for (var f =0; f < this.files.length; f++) {
             this.files[f] = this.files[f].trim();
         }
         this.p = (this.files.length == 1) ? this.files[0] : JSON.stringify(this.files);
diff --git a/nodes/core/io/25-serial.js b/nodes/core/io/25-serial.js
index 5a3f92d1d..f7d64d3a1 100644
--- a/nodes/core/io/25-serial.js
+++ b/nodes/core/io/25-serial.js
@@ -61,7 +61,7 @@ module.exports = function(RED) {
                     if (typeof payload === "object") {
                         payload = JSON.stringify(payload);
                     } else {
-                        payload = new String(payload);
+                        payload = payload.toString();
                     }
                     payload += node.addCh;
                 } else if (node.addCh !== "") {
@@ -115,15 +115,16 @@ module.exports = function(RED) {
                 this.serialConfig.newline
             );
 
+            var splitc;
             if (node.serialConfig.newline.substr(0,2) == "0x") {
-                var splitc = new Buffer([parseInt(node.serialConfig.newline)]);
+                splitc = new Buffer([parseInt(node.serialConfig.newline)]);
             } else {
-                var splitc = new Buffer(node.serialConfig.newline.replace("\\n","\n").replace("\\r","\r").replace("\\t","\t").replace("\\e","\e").replace("\\f","\f").replace("\\0","\0"));
+                splitc = new Buffer(node.serialConfig.newline.replace("\\n","\n").replace("\\r","\r").replace("\\t","\t").replace("\\e","\e").replace("\\f","\f").replace("\\0","\0"));
             }
 
             this.port.on('data', function(msg) {
                 // single char buffer
-                if ((node.serialConfig.newline == 0)||(node.serialConfig.newline == "")) {
+                if ((node.serialConfig.newline === 0)||(node.serialConfig.newline === "")) {
                     if (node.serialConfig.bin !== "bin") { node.send({"payload": String.fromCharCode(msg)}); }
                     else { node.send({"payload": new Buffer([msg])}); }
                 }
@@ -222,7 +223,7 @@ module.exports = function(RED) {
                                     parity: parity,
                                     stopbits: stopbits,
                                     parser: serialp.parsers.raw
-                                },true, function(err, results) { if (err) obj.serial.emit('error',err); });
+                                },true, function(err, results) { if (err) { obj.serial.emit('error',err); } });
                             //}
                             //else {
                             //    obj.serial = new serialp.SerialPort(port,{
@@ -267,6 +268,9 @@ module.exports = function(RED) {
                                 //    obj._emitter.emit('data',d);
                                 //}
                             });
+                            obj.serial.on("disconnect",function() {
+                                node.warn("Serial Port gone away.");
+                            });
                         }
                         setupSerial();
                         return obj;
@@ -285,7 +289,8 @@ module.exports = function(RED) {
                             util.log("[serial] serial port closed");
                             done();
                         });
-                    } catch(err) { };
+                    }
+                    catch(err) { }
                     delete connections[port];
                 } else {
                     done();