diff --git a/ISF Editor/ISFEditorAppDelegate.m b/ISF Editor/ISFEditorAppDelegate.m
index c7531eae..113e2e84 100644
--- a/ISF Editor/ISFEditorAppDelegate.m	
+++ b/ISF Editor/ISFEditorAppDelegate.m	
@@ -1048,8 +1048,16 @@ - (void) _renderCallback	{
 								lineDelta = 0;
 							}
 							else	{
-								NSInteger			numberOfLinesAppendedToVS = [[compiledVertSrc substringFromIndex:rangeOfEndOfVS.location] numberOfLines];
-								lineDelta = [precompiledVertSrc numberOfLines] - ([compiledVertSrc numberOfLines]-numberOfLinesAppendedToVS);
+								firstLineAppendedToVS = @"\nvoid isf_vertShaderInit(void)\t{";
+								rangeOfEndOfVS = [compiledVertSrc rangeOfString:firstLineAppendedToVS];
+								if (rangeOfEndOfVS.location==NSNotFound || rangeOfEndOfVS.length!=[firstLineAppendedToVS length])	{
+									NSLog(@"\t\tERR: couldn't locate end of precompiled shader in compiled vertex shader, %s",__func__);
+									lineDelta = 0;
+								}
+								else	{
+									NSInteger			numberOfLinesAppendedToVS = [[compiledVertSrc substringFromIndex:rangeOfEndOfVS.location] numberOfLines];
+									lineDelta = [precompiledVertSrc numberOfLines] - ([compiledVertSrc numberOfLines]-numberOfLinesAppendedToVS);
+								}
 							}
 						}
 						//	if there's no difference in line numbers, just copy the error log in its entirety
diff --git a/ISF Editor/ISFPDownloader.m b/ISF Editor/ISFPDownloader.m
index 48cf002e..143f3646 100644
--- a/ISF Editor/ISFPDownloader.m	
+++ b/ISF Editor/ISFPDownloader.m	
@@ -356,6 +356,8 @@ - (void) downloadResultsForURLString:(NSString *)address	{
 				//	if the vertString is the default vertString, we can skip it
 				if ([vertString isEqualToString:@"void main() {\n\tvv_vertShaderInit();\n}"])
 					vertString = nil;
+				else if ([vertString isEqualToString:@"void main() {\n\tisf_vertShaderInit();\n}"])
+					vertString = nil;
 				
 				//	if the folder doesn't already exist
 				NSString		*shaderDir = VVFMTSTRING(@"%@/%d",baseDir,[idNum intValue]);
diff --git a/VVBufferPool/VVBufferPool.h b/VVBufferPool/VVBufferPool.h
index 21dd67cd..7a83486d 100644
--- a/VVBufferPool/VVBufferPool.h
+++ b/VVBufferPool/VVBufferPool.h
@@ -55,6 +55,7 @@
 extern id				_globalVVBufferPool;	//	retained, nil on launch- this is the "main" buffer pool, used to generate image resources for hardware-accelerated image processing.  can't be created automatically, b/c it needs to be based on a shared context.
 #if !TARGET_OS_IPHONE
 extern int				_msaaMaxSamples;
+extern int				_glMaxTextureDimension;
 #endif	//	!TARGET_OS_IPHONE
 extern BOOL			_bufferPoolInitialized;
 extern VVStopwatch	*_bufferTimestampMaker;
diff --git a/VVBufferPool/VVBufferPool.m b/VVBufferPool/VVBufferPool.m
index 5df2928f..3f907e77 100644
--- a/VVBufferPool/VVBufferPool.m
+++ b/VVBufferPool/VVBufferPool.m
@@ -18,6 +18,7 @@
 id _globalVVBufferPool = nil;
 #if !TARGET_OS_IPHONE
 int				_msaaMaxSamples = 0;
+int				_glMaxTextureDimension = 1024;
 #endif	//	!TARGET_OS_IPHONE
 BOOL			_bufferPoolInitialized = NO;
 VVStopwatch		*_bufferTimestampMaker = nil;
@@ -58,6 +59,8 @@ + (void) initialize	{
 		GLint			tmp;
 		glGetIntegerv(GL_MAX_SAMPLES_EXT,&tmp);
 		_msaaMaxSamples = tmp;
+		glGetIntegerv(GL_MAX_TEXTURE_SIZE, &tmp);
+		_glMaxTextureDimension = tmp;
 		[tmpContext release];
 	}
 #else	//	NOT !TARGET_OS_IPHONE