[vtkusers] ImageViewer2 extent problem

[David Borland]

I'm using ImageViewer2 to view some images.  For right now, I have a 
very simple pipeline:

vtkImageReader->vtkImageViewer2

It works fine when initially loading an image.  However, when reading a 
new image, it does not work correctly.  If the new image is larger than 
the old image, the image does not look correct, and when it is smaller 
than the old image, the image is again incorrect, and there is an 
'Update extent does not lie within whole extent' error.

It appears that the new whole extent is being correctly propagated 
through the pipeline, but the update extent is not.  I've noticed 
similar problems on the mailing list, but have not been able to find a 
solution.  Can anyone help me out?  Thanks,

David