diff --git a/datacache/mdlcache.cpp b/datacache/mdlcache.cpp
index 9ef8c6f3..9af1150c 100644
--- a/datacache/mdlcache.cpp
+++ b/datacache/mdlcache.cpp
@@ -81,7 +81,7 @@ namespace {
 #if defined( _X360 )
 #define AsyncMdlCache() 0	// Explicitly OFF for 360 (incompatible)
 #else
-#define AsyncMdlCache() 0
+#define AsyncMdlCache() 1
 #endif
 
 #define ERROR_MODEL		"models/error.mdl"
diff --git a/public/togles/linuxwin/glmgr.h b/public/togles/linuxwin/glmgr.h
index 111d8501..1d70adcc 100644
--- a/public/togles/linuxwin/glmgr.h
+++ b/public/togles/linuxwin/glmgr.h
@@ -69,6 +69,8 @@
 #define GL_ALPHA_TEST_FUNC_QCOM 0x0BC1
 #define GL_ALPHA_TEST_REF_QCOM 0x0BC2
 
+#define GLSL_VERSION "#version 300 es\n"
+
 extern void GLMDebugPrintf( const char *pMsg, ... );
 
 extern uint g_nTotalDrawsOrClears, g_nTotalVBLockBytes, g_nTotalIBLockBytes;
diff --git a/togles/linuxwin/cglmtex.cpp b/togles/linuxwin/cglmtex.cpp
index a5811f3b..5ed83df2 100644
--- a/togles/linuxwin/cglmtex.cpp
+++ b/togles/linuxwin/cglmtex.cpp
@@ -427,7 +427,7 @@ bool	GLMGenTexels( GLMGenTexelParams *params )
 		DebuggerBreak();
 		return FALSE;
 	}
-	
+
 	// verify that the amount you want to write will not exceed the limit byte count
 	unsigned long destByteCount = chunksize * params->m_chunkCount;
 	
@@ -3828,7 +3828,7 @@ void CGLMTex::Lock( GLMTexLockParams *params, char** addressOut, int* yStrideOut
 	// d - the params of the lock request have been saved in the lock table (in the context)
 	
 	// so step 1 is unambiguous.  If there's no backing storage, make some.
-	if (!m_backing)
+	if (!m_backing && !(m_layout->m_key.m_texFlags & kGLMTexDynamic))
 	{
 		if ( gl_pow2_tempmem.GetBool() )
 		{
@@ -3940,7 +3940,7 @@ void CGLMTex::Lock( GLMTexLockParams *params, char** addressOut, int* yStrideOut
 
 	desc->m_sliceRegionOffset = offsetInSlice + desc->m_sliceBaseOffset;
 
-	if ( copyout && ( (m_layout->m_key.m_texFlags & kGLMTexDynamic) || params->m_readonly ) )
+	if ( (m_layout->m_key.m_texFlags & kGLMTexDynamic) || (params->m_readonly && copyout) )
 	{
 		// read the whole slice
 		// (odds are we'll never request anything but a whole slice to be read..)
@@ -4080,7 +4080,7 @@ void CGLMTex::Unlock( GLMTexLockParams *params )
 		// because it reuploads the whole thing each slice; we only use 3D textures
 		// for the 32x32x32 colorpsace conversion lookups and debugging the problem
 		// would not save any more memory.
-		if ( !m_texClientStorage && ( m_texGLTarget == GL_TEXTURE_2D ) )
+		if ( !m_texClientStorage && ( m_texGLTarget == GL_TEXTURE_2D ) && m_backing )
 		{
 			free(m_backing);
 			m_backing = NULL;
diff --git a/togles/linuxwin/dx9asmtogl2.cpp b/togles/linuxwin/dx9asmtogl2.cpp
index 41d08a94..578bcad9 100644
--- a/togles/linuxwin/dx9asmtogl2.cpp
+++ b/togles/linuxwin/dx9asmtogl2.cpp
@@ -3287,13 +3287,13 @@ int D3DToGL::TranslateShader( uint32* code, CUtlBuffer *pBufDisassembledCode, bo
 	if ( ( dwToken & 0xFFFF0000 ) == 0xFFFF0000 )
 	{
 		// must explicitly enable extensions if emitting GLSL
-		V_snprintf( (char *)m_pBufHeaderCode->Base(), m_pBufHeaderCode->Size(), "#version 300 es\nprecision highp float;\n#define varying in\n\n%s", glslExtText );
+		V_snprintf( (char *)m_pBufHeaderCode->Base(), m_pBufHeaderCode->Size(), GLSL_VERSION "precision highp float;\n#define varying in\n\n%s", glslExtText );
 		m_bVertexShader = false;
 	}
 	else // vertex shader
 	{
 		m_bGenerateSRGBWriteSuffix = false;
-		V_snprintf( (char *)m_pBufHeaderCode->Base(), m_pBufHeaderCode->Size(), "#version 300 es\nprecision highp float;\n#define attribute in\n#define varying out\n%s//ATTRIBMAP-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx\n", glslExtText );
+		V_snprintf( (char *)m_pBufHeaderCode->Base(), m_pBufHeaderCode->Size(), GLSL_VERSION "precision highp float;\n#define attribute in\n#define varying out\n%s//ATTRIBMAP-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx-xx\n", glslExtText );
 
 		// find that first '-xx' which is where the attrib map will be written later.
 		pAttribMapStart = strstr( (char *)m_pBufHeaderCode->Base(), "-xx" ) + 1;