Q:  I have allocated an instance of NXBitmapImageRep and am reusing the instance in my application with repeated calls to 

	-initData:pixelsWide:pixelHigh:bitsPerSample:samplesPerPixel:
		hasAlpha:isPlanar:colorSpace:bytesPerRow:bitsPerPixel:
	
each time passing a new chunk of raw image data.  However my application is crashing.  Is my use of -initData legal?

Q:  Once I have allocated an object in the AppKit can I then reinitialize it repeatedly?

A:  The init methods should never be called twice on the same alloc'd instance.  Some classes allow you to reuse an instance by resetting key values using a setFoo: method.  However this is not possible with the NXBitmapImageRep class.  In this case, the overhead of the alloc is very small;  the required implementation is to free the previous instance and allocate a new one on the fly each time you need to perform an initData.

QA663	

Valid for 2.0, 3.0