diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6eb065d04..0a5507b92 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -54,13 +54,19 @@ macro(copy_files_to_build_dir target dlllist_var)
 	endif()
 endmacro()
 
-# 64-bit check
-if(${CMAKE_SIZEOF_VOID_P} EQUAL 8)
+# bitness check
+set(SRB2_SYSTEM_BITS 0)
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
 	message(STATUS "Target is 64-bit")
 	set(SRB2_SYSTEM_BITS 64)
-else()
+endif()
+if(CMAKE_SIZEOF_VOID_P EQUAL 4)
+	message(STATUS "Target is 32-bit")
 	set(SRB2_SYSTEM_BITS 32)
 endif()
+if(${SRB2_SYSTEM_BITS} EQUAL 0)
+	message(STATUS "Target bitness is unknown")
+endif()
 
 # OS macros
 if (UNIX)
diff --git a/src/i_tcp.c b/src/i_tcp.c
index f8a65b754..11a84ceba 100644
--- a/src/i_tcp.c
+++ b/src/i_tcp.c
@@ -612,7 +612,7 @@ static boolean SOCK_Get(void)
 		if (c != ERRSOCKET)
 		{
 			// find remote node number
-			for (j = 0; j <= MAXNETNODES; j++) //include LAN
+			for (j = 1; j <= MAXNETNODES; j++) //include LAN
 			{
 				if (SOCK_cmpaddr(&fromaddress, &clientaddress[j], 0))
 				{
@@ -1340,8 +1340,12 @@ static SINT8 SOCK_NetMakeNodewPort(const char *address, const char *port)
 	while (runp != NULL)
 	{
 		// find ip of the server
-		memcpy(&clientaddress[newnode], runp->ai_addr, runp->ai_addrlen);
-		runp = NULL;
+		if (sendto(mysockets[0], NULL, 0, 0, runp->ai_addr, runp->ai_addrlen) == 0)
+		{
+			memcpy(&clientaddress[newnode], runp->ai_addr, runp->ai_addrlen);
+			break;
+		}
+		runp = runp->ai_next;
 	}
 	I_freeaddrinfo(ai);
 	return newnode;
diff --git a/src/sdl/i_system.c b/src/sdl/i_system.c
index b5597784e..517c183ee 100644
--- a/src/sdl/i_system.c
+++ b/src/sdl/i_system.c
@@ -1402,7 +1402,13 @@ static int joy_open2(const char *fname)
 void I_InitJoystick(void)
 {
 	I_ShutdownJoystick();
-	SDL_SetHintWithPriority("SDL_XINPUT_ENABLED", "0", SDL_HINT_OVERRIDE);
+
+	if (M_CheckParm("-noxinput"))
+		SDL_SetHintWithPriority("SDL_XINPUT_ENABLED", "0", SDL_HINT_OVERRIDE);
+
+	if (M_CheckParm("-nohidapi"))
+		SDL_SetHintWithPriority("SDL_JOYSTICK_HIDAPI", "0", SDL_HINT_OVERRIDE);
+
 	if (!strcmp(cv_usejoystick.string, "0") || M_CheckParm("-nojoy"))
 		return;
 	if (joy_open(cv_usejoystick.string) != -1)
@@ -1418,7 +1424,13 @@ void I_InitJoystick(void)
 void I_InitJoystick2(void)
 {
 	I_ShutdownJoystick2();
-	SDL_SetHintWithPriority("SDL_XINPUT_ENABLED", "0", SDL_HINT_OVERRIDE);
+
+	if (M_CheckParm("-noxinput"))
+		SDL_SetHintWithPriority("SDL_XINPUT_ENABLED", "0", SDL_HINT_OVERRIDE);
+
+	if (M_CheckParm("-nohidapi"))
+		SDL_SetHintWithPriority("SDL_JOYSTICK_HIDAPI", "0", SDL_HINT_OVERRIDE);
+
 	if (!strcmp(cv_usejoystick2.string, "0") || M_CheckParm("-nojoy"))
 		return;
 	if (joy_open2(cv_usejoystick2.string) != -1)
diff --git a/src/w_wad.c b/src/w_wad.c
index 4d95c3bbd..5bf7a36d3 100644
--- a/src/w_wad.c
+++ b/src/w_wad.c
@@ -1179,6 +1179,23 @@ void zerr(int ret)
 }
 #endif
 
+#define NO_PNG_LUMPS
+
+#ifdef NO_PNG_LUMPS
+static void ErrorIfPNG(UINT8 *d, size_t s, char *f, char *l)
+{
+    if (s < 67) // http://garethrees.org/2007/11/14/pngcrush/
+        return;
+    // Check for PNG file signature using memcmp
+    // As it may be faster on CPUs with slow unaligned memory access
+    // Ref: http://www.libpng.org/pub/png/spec/1.2/PNG-Rationale.html#R.PNG-file-signature
+    if (memcmp(&d[0], "\x89\x50\x4e\x47\x0d\x0a\x1a\x0a", 8) == 0)
+    {
+        I_Error("W_Wad: Lump \"%s\" in file \"%s\" is a .PNG - please convert to either Doom or Flat (raw) image format.", l, f);
+    }
+}
+#endif
+
 /** Reads bytes from the head of a lump.
   * Note: If the lump is compressed, the whole thing has to be read anyway.
   *
@@ -1218,7 +1235,15 @@ size_t W_ReadLumpHeaderPwad(UINT16 wad, UINT16 lump, void *dest, size_t size, si
 	switch(wadfiles[wad]->lumpinfo[lump].compression)
 	{
 	case CM_NOCOMPRESSION:		// If it's uncompressed, we directly write the data into our destination, and return the bytes read.
+#ifdef NO_PNG_LUMPS
+		{
+			size_t bytesread = fread(dest, 1, size, handle);
+			ErrorIfPNG(dest, bytesread, wadfiles[wad]->filename, l->name2);
+			return bytesread;
+		}
+#else
 		return fread(dest, 1, size, handle);
+#endif
 	case CM_LZF:		// Is it LZF compressed? Used by ZWADs.
 		{
 #ifdef ZWAD
@@ -1253,11 +1278,15 @@ size_t W_ReadLumpHeaderPwad(UINT16 wad, UINT16 lump, void *dest, size_t size, si
 			M_Memcpy(dest, decData + offset, size);
 			Z_Free(rawData);
 			Z_Free(decData);
+#ifdef NO_PNG_LUMPS
+			ErrorIfPNG(dest, size, wadfiles[wad]->filename, l->name2);
+#endif
 			return size;
 #else
 			//I_Error("ZWAD files not supported on this platform.");
 			return 0;
 #endif
+
 		}
 #ifdef HAVE_ZLIB
 	case CM_DEFLATE: // Is it compressed via DEFLATE? Very common in ZIPs/PK3s, also what most doom-related editors support.
@@ -1311,6 +1340,9 @@ size_t W_ReadLumpHeaderPwad(UINT16 wad, UINT16 lump, void *dest, size_t size, si
 			Z_Free(rawData);
 			Z_Free(decData);
 
+#ifdef NO_PNG_LUMPS
+			ErrorIfPNG(dest, size, wadfiles[wad]->filename, l->name2);
+#endif
 			return size;
 		}
 #endif