title: Huge memory leak in NSBitmapImageRep
body: <p>I have a method that analyzes pixel data inside an NSBitmapImageRep that is built from a CGImageRef. Here is the relevant code:</p>
  
  <pre><code>CGImageRef ref;
  // omitted code for initializing ref
  NSBitmapImageRep *bitmapRep = [[NSBitmapImageRep alloc] initWithCGImage:ref];
  uint32* bitmapPixels = (uint32*) [bitmapRep bitmapData];
  // do stuff with bitmapPixels
  [bitmapRep release];
  CGImageRelease(ref);
  </code></pre>
  
  <p>I know I'm properly releasing the CGImageRef and NSBitmapImageRep, but the call to -bitmapData leaks about 2 MB each time it's called, and I don't know how to properly release it. Any ideas?</p>
  
  <p><strong>Update:</strong> I forgot to add one important point: memory is only leaked when there is a full screen application running. For regular usage, the memory is released just fine.</p>