Quartz Composer/Core Video broken for me in Leopard

CVReturn returnVal = CVOpenGLBufferAttach(

coreVideoBufferP,

reinterpret_cast<CGLContextObj>([secondFullScreenOpenGLContext CGLContextObj]),

);

NSAssert(returnVal == kCVReturnSuccess, @"CVOpenGLBufferAttach failed");

[secondFullScreenOpenGLContext makeCurrentContext];

I then render my GL world and:

glFlush();

[secondFullScreenOpenGLContext clearDrawable];

After that I call upon Quartz Composer:

// Set up our world image input with our CV buffer

[qcRenderer setValue:(id)coreVideoBufferP forInputKey:@"World_Image"];

//Render a frame

[qcRenderer renderAtTime:theCurrentTime arguments:0];

//Flush the OpenGL context to display the frame on screen

[fullScreenOpenGLContext flushBuffer];

Here's how I create my CV context:

NSAssert(fullScreenGLPixelFormat, @"!fullScreenGLPixelFormat");

secondFullScreenOpenGLContext = [[NSOpenGLContext alloc]

initWithFormat:fullScreenGLPixelFormat

shareContext:viewOpenGLContext];

if (secondFullScreenOpenGLContext) {

float theUserSpaceScaleFactor = 1.0;

float theScreenWidth = static_cast<float>(CGDisplayPixelsWide(

displayIDs[displayIDIndex])) * theUserSpaceScaleFactor;

float theScreenHeight = static_cast<float>(CGDisplayPixelsHigh(

displayIDs[displayIDIndex])) * theUserSpaceScaleFactor;

NSAssert(coreVideoBufferP == 0, @"coreVideoBufferP != 0");

CVReturn theReturnVal = CVOpenGLBufferCreate(

theScreenWidth,

theScreenHeight,

&coreVideoBufferP

);

NSAssert(theReturnVal == kCVReturnSuccess && coreVideoBufferP ,

@"!(returnVal == kCVReturnSuccess && coreVideoBuffer)");

}

Any hints on what may have changed in Leopard with regards to Core Video/Quartz Composer? Could this even be a resolution independence thing somehow?

Cheers,

-C