I'm getting this crash both in my app and in composer at seemingly random 
times. Seems to work okay on 9400m, is this an issue with the ATI driver?

Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000013b4005b0
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   ...pple.ATIRadeonX2000GLDriver      0x0000000114c03128 gldUpdateDispatch + 
105816
1   ...pple.ATIRadeonX2000GLDriver      0x0000000114bf12c9 gldUpdateDispatch + 
32505
2   ...pple.ATIRadeonX2000GLDriver      0x0000000114c01057 gldUpdateDispatch + 
97415
3   ...pple.ATIRadeonX2000GLDriver      0x0000000114befb85 gldUpdateDispatch + 
26549
4   ...pple.ATIRadeonX2000GLDriver      0x0000000114bd8002 gldFinish + 3586
5   GLEngine                            0x0000000114af6e98 gleObjectUnpurgeable 
+ 226
6   GLEngine                            0x0000000114a62832 
glObjectUnpurgeableAPPLE_Exec + 206
7   com.apple.QuartzComposer            0x00007fff81ba035d 
-[QCImageTextureBuffer setPurgeable:] + 790
8   com.apple.QuartzComposer            0x00007fff81b7722b -[QCCache 
copyAnyResource] + 611
9   com.apple.QuartzComposer            0x00007fff81b9dac3 -[QCImageManager 
createTextureBufferWithFormat:target:pixelsWide:pixelsHigh:options:] + 903
10  com.apple.QuartzComposer            0x00007fff81be469b 
-[QCProvider_CoreImage 
createTextureBufferForManager:withFormat:target:transformation:bounds:colorSpace:options:]
 + 184
11  com.apple.QuartzComposer            0x00007fff81b9758b 
-[QCImageManager(Internal) 
_createImageBufferFromProvider:withFormat:target:transformation:bounds:colorSpace:options:]
 + 6007
12  com.apple.QuartzComposer            0x00007fff81b95dfb -[QCImageManager 
createTextureBufferFromProvider:withFormat:target:transformation:bounds:colorSpace:options:]
 + 1961
13  com.apple.QuartzComposer            0x00007fff81be3eab -[QCImagePort_Cache 
setOnOpenGLContext:unit:withBounds:transformation:target:mipmappingLevels:matrix:]
 + 1958
14  com.apple.QuartzComposer            0x00007fff81be36e7 -[QCOpenGLPort_Image 
setOnOpenGLContext:unit:fromBounds:withTarget:mipmappingLevels:matrix:] + 82
15  com.apple.QuartzComposer            0x00007fff81bb0826 -[QCBillboard 
execute:time:arguments:] + 9892
16  com.apple.QuartzComposer            0x00007fff81b83875 -[QCPatch(Private) 
_renderAtTime:arguments:] + 108
17  com.apple.QuartzComposer            0x00007fff81bade61 -[QCRenderingPatch 
_renderAtTime:arguments:] + 141
18  com.apple.QuartzComposer            0x00007fff81b84be1 -[QCRenderingManager 
renderAtTime:arguments:] + 1951
19  com.apple.QuartzComposer            0x00007fff81b83875 -[QCPatch(Private) 
_renderAtTime:arguments:] + 108
20  com.apple.QuartzComposer            0x00007fff81b84be1 -[QCRenderingManager 
renderAtTime:arguments:] + 1951
21  com.apple.QuartzComposer            0x00007fff81b83875 -[QCPatch(Private) 
_renderAtTime:arguments:] + 108
22  com.apple.QuartzComposer            0x00007fff81b84be1 -[QCRenderingManager 
renderAtTime:arguments:] + 1951
23  com.apple.QuartzComposer            0x00007fff81b83875 -[QCPatch(Private) 
_renderAtTime:arguments:] + 108
24  com.apple.QuartzComposer            0x00007fff81b8c300 -[QCContext 
renderPatch:time:arguments:] + 548
25  com.apple.QuartzComposer            0x00007fff81b8c071 -[QCGraphicsContext 
renderPatch:time:arguments:] + 74
26  com.apple.QuartzComposer            0x00007fff81b8b1bf -[QCOpenGLContext 
renderPatch:time:arguments:] + 559
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