Comment 4 for bug 295991

same problem here, I found a workaround on the compiz forums here:

http://forum.compiz-fusion.org/showthread.php?t=10304&highlight=text

I had to add:
        Option "RenderAccel" "False"
to the device section of my xorg.conf and now everything displays correctly. The posters also suggest an earlier driver version but I haven't tried that yet so as not to bork the apt-get handling of my drivers.