diff --git a/src/client.h b/src/client.h
index a5fda98d7..885dc9d3b 100644
--- a/src/client.h
+++ b/src/client.h
@@ -409,7 +409,8 @@ public:
 	void addUpdateMeshTaskWithEdge(v3s16 blockpos, bool ack_to_server=false, bool urgent=false);
 	void addUpdateMeshTaskForNode(v3s16 nodepos, bool ack_to_server=false, bool urgent=false);
 	
-	void updateCameraOffset(v3s16 camera_offset){ m_mesh_update_thread.m_camera_offset = camera_offset; }
+	void updateCameraOffset(v3s16 camera_offset)
+	{ m_mesh_update_thread.m_camera_offset = camera_offset; }
 
 	// Get event from queue. CE_NONE is returned if queue is empty.
 	ClientEvent getClientEvent();
diff --git a/src/connection.cpp b/src/connection.cpp
index 32634ac89..ae1e4a1db 100644
--- a/src/connection.cpp
+++ b/src/connection.cpp
@@ -111,10 +111,10 @@ SharedBuffer<u8> makeOriginalPacket(
 	u32 packet_size = data.getSize() + header_size;
 	SharedBuffer<u8> b(packet_size);
 
-	writeU8(&b[0], TYPE_ORIGINAL);
-
-	memcpy(&b[header_size], *data, data.getSize());
-
+	writeU8(&(b[0]), TYPE_ORIGINAL);
+	if (data.getSize() > 0) {
+		memcpy(&(b[header_size]), *data, data.getSize());
+	}
 	return b;
 }
 
@@ -2266,14 +2266,14 @@ SharedBuffer<u8> ConnectionReceiveThread::processPacket(Channel *channel,
 	if(packetdata.getSize() < 1)
 		throw InvalidIncomingDataException("packetdata.getSize() < 1");
 
-	u8 type = readU8(&packetdata[0]);
+	u8 type = readU8(&(packetdata[0]));
 
 	if(type == TYPE_CONTROL)
 	{
 		if(packetdata.getSize() < 2)
 			throw InvalidIncomingDataException("packetdata.getSize() < 2");
 
-		u8 controltype = readU8(&packetdata[1]);
+		u8 controltype = readU8(&(packetdata[1]));
 
 		if( (controltype == CONTROLTYPE_ACK)
 				&& (peer_id <= MAX_UDP_PEERS))
@@ -2398,15 +2398,15 @@ SharedBuffer<u8> ConnectionReceiveThread::processPacket(Channel *channel,
 	}
 	else if(type == TYPE_ORIGINAL)
 	{
-		if(packetdata.getSize() < ORIGINAL_HEADER_SIZE)
+		if(packetdata.getSize() <= ORIGINAL_HEADER_SIZE)
 			throw InvalidIncomingDataException
-					("packetdata.getSize() < ORIGINAL_HEADER_SIZE");
+					("packetdata.getSize() <= ORIGINAL_HEADER_SIZE");
 		LOG(dout_con<<m_connection->getDesc()
 				<<"RETURNING TYPE_ORIGINAL to user"
 				<<std::endl);
 		// Get the inside packet out and return it
 		SharedBuffer<u8> payload(packetdata.getSize() - ORIGINAL_HEADER_SIZE);
-		memcpy(*payload, &packetdata[ORIGINAL_HEADER_SIZE], payload.getSize());
+		memcpy(*payload, &(packetdata[ORIGINAL_HEADER_SIZE]), payload.getSize());
 		return payload;
 	}
 	else if(type == TYPE_SPLIT)
diff --git a/src/guiEngine.cpp b/src/guiEngine.cpp
index f18473ee0..bba000640 100644
--- a/src/guiEngine.cpp
+++ b/src/guiEngine.cpp
@@ -226,7 +226,8 @@ bool GUIEngine::loadMainMenuScript()
 		}
 		else {
 			infostream
-				<< "GUIEngine: execution of custom menu failed!"
+				<< "GUIEngine: execution of custom menu: \""
+				<< menuscript << "\" failed!"
 				<< std::endl
 				<< "\tfalling back to builtin menu"
 				<< std::endl;
diff --git a/src/localplayer.cpp b/src/localplayer.cpp
index e545dc42a..a7a105fc5 100644
--- a/src/localplayer.cpp
+++ b/src/localplayer.cpp
@@ -268,8 +268,9 @@ void LocalPlayer::move(f32 dtime, Environment *env, f32 pos_max_d,
 				if(nodemgr->get(map->getNode(p)).walkable == false)
 					continue;
 				// And the node above it has to be nonwalkable
-				if(nodemgr->get(map->getNode(p+v3s16(0,1,0))).walkable == true)
+				if(nodemgr->get(map->getNode(p+v3s16(0,1,0))).walkable == true) {
 					continue;
+				}
 				if (!physics_override_sneak_glitch) {
 					if (nodemgr->get(map->getNode(p+v3s16(0,2,0))).walkable)
 						continue;
diff --git a/src/main.cpp b/src/main.cpp
index bb0c3a273..376ce2ae2 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -266,6 +266,7 @@ public:
 			} else {
 				keyIsDown.unset(event.KeyInput);
 			}
+			return true;
 		}
 
 		if(event.EventType == irr::EET_MOUSE_INPUT_EVENT)
@@ -1484,10 +1485,11 @@ int main(int argc, char *argv[])
 	bool random_input = g_settings->getBool("random_input")
 			|| cmd_args.getFlag("random-input");
 	InputHandler *input = NULL;
-	if(random_input)
+	if(random_input) {
 		input = new RandomInputHandler();
-	else
+	} else {
 		input = new RealInputHandler(device, &receiver);
+	}
 
 	scene::ISceneManager* smgr = device->getSceneManager();
 
diff --git a/src/porting.cpp b/src/porting.cpp
index e7bef1d33..53b3a3784 100644
--- a/src/porting.cpp
+++ b/src/porting.cpp
@@ -191,7 +191,7 @@ bool threadBindToProcessor(threadid_t tid, int pnumber) {
 
 #elif defined(__sun) || defined(sun)
 
-	return processor_bind(P_LWPID, MAKE_LWPID_PTHREAD(tid), 
+	return processor_bind(P_LWPID, MAKE_LWPID_PTHREAD(tid),
 						pnumber, NULL) == 0;
 
 #elif defined(_AIX)
@@ -477,7 +477,7 @@ void initializePaths()
 			i != trylist.end(); i++)
 	{
 		const std::string &trypath = *i;
-		if(!fs::PathExists(trypath) || !fs::PathExists(trypath + "/builtin")){
+		if(!fs::PathExists(trypath) || !fs::PathExists(trypath + DIR_DELIM + "builtin")){
 			dstream<<"WARNING: system-wide share not found at \""
 					<<trypath<<"\""<<std::endl;
 			continue;
@@ -491,37 +491,37 @@ void initializePaths()
 		break;
 	}
 
-	path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
+	path_user = std::string(getenv("HOME")) + DIR_DELIM + "." + PROJECT_NAME;
 
 	/*
 		OS X
 	*/
 	#elif defined(__APPLE__)
 
-    // Code based on
-    // http://stackoverflow.com/questions/516200/relative-paths-not-working-in-xcode-c
-    CFBundleRef main_bundle = CFBundleGetMainBundle();
-    CFURLRef resources_url = CFBundleCopyResourcesDirectoryURL(main_bundle);
-    char path[PATH_MAX];
-    if(CFURLGetFileSystemRepresentation(resources_url, TRUE, (UInt8 *)path, PATH_MAX))
+	// Code based on
+	// http://stackoverflow.com/questions/516200/relative-paths-not-working-in-xcode-c
+	CFBundleRef main_bundle = CFBundleGetMainBundle();
+	CFURLRef resources_url = CFBundleCopyResourcesDirectoryURL(main_bundle);
+	char path[PATH_MAX];
+	if(CFURLGetFileSystemRepresentation(resources_url, TRUE, (UInt8 *)path, PATH_MAX))
 	{
 		dstream<<"Bundle resource path: "<<path<<std::endl;
 		//chdir(path);
-		path_share = std::string(path) + "/share";
+		path_share = std::string(path) + DIR_DELIM + "share";
 	}
 	else
-    {
-        // error!
+	{
+		// error!
 		dstream<<"WARNING: Could not determine bundle resource path"<<std::endl;
-    }
-    CFRelease(resources_url);
+	}
+	CFRelease(resources_url);
 
 	path_user = std::string(getenv("HOME")) + "/Library/Application Support/" + PROJECT_NAME;
 
 	#else // FreeBSD, and probably many other POSIX-like systems.
 
 	path_share = STATIC_SHAREDIR;
-	path_user = std::string(getenv("HOME")) + "/." + PROJECT_NAME;
+	path_user = std::string(getenv("HOME")) + DIR_DELIM + "." + PROJECT_NAME;
 
 	#endif
 
diff --git a/src/settings.h b/src/settings.h
index 53e8d8ef5..13c8e1e65 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -37,6 +37,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include <map>
 #include <set>
 #include "filesys.h"
+#include <cctype>
 
 enum ValueType
 {
@@ -575,7 +576,7 @@ public:
 	u32 getFlagStr(std::string name, FlagDesc *flagdesc, u32 *flagmask)
 	{
 		std::string val = get(name);
-		return (isdigit(val[0])) ? stoi(val) :
+		return (std::isdigit(val[0])) ? stoi(val) :
 			readFlagString(val, flagdesc, flagmask);
 	}
 
diff --git a/src/tile.cpp b/src/tile.cpp
index b8080c708..78aa4d946 100644
--- a/src/tile.cpp
+++ b/src/tile.cpp
@@ -730,9 +730,6 @@ u32 TextureSource::getTextureIdDirect(const std::string &name)
 	m_textureinfo_cache.push_back(ti);
 	m_name_to_id[name] = id;
 
-	/*infostream<<"getTextureIdDirect(): "
-			<<"Returning id="<<id<<" for name \""<<name<<"\""<<std::endl;*/
-
 	return id;
 }
 
@@ -962,6 +959,20 @@ bool TextureSource::generateImage(std::string part_of_name, video::IImage *& bas
 	{
 		video::IImage *image = m_sourcecache.getOrLoad(part_of_name, m_device);
 
+		if (image != NULL) {
+			if (!driver->queryFeature(irr::video::EVDF_TEXTURE_NPOT)) {
+				core::dimension2d<u32> dim = image->getDimension();
+
+
+				if ((dim.Height %2 != 0) ||
+						(dim.Width %2 != 0)) {
+					errorstream << "TextureSource::generateImage "
+							<< part_of_name << " size npot2 x=" << dim.Width
+							<< " y=" << dim.Height << std::endl;
+				}
+			}
+		}
+
 		if(image == NULL)
 		{
 			if(part_of_name != ""){
diff --git a/src/util/pointer.h b/src/util/pointer.h
index ba43b7844..7922a9b39 100644
--- a/src/util/pointer.h
+++ b/src/util/pointer.h
@@ -258,7 +258,7 @@ public:
 	}
 	T & operator[](unsigned int i) const
 	{
-		//assert(i < m_size)
+		assert(i < m_size);
 		return data[i];
 	}
 	T * operator*() const