Comment 5 for bug 552681

I don't think this is a grace issue only. This is an X server issue. Unfortunaly there hasn't been a new release from Ubuntu yet.
I have put a few notes on my blog on how I fixed this. Gladly rebuilding the X server from source is pretty straight forward these days in ubuntu....
If you are interested in the fix, please see: http://twboutnothing.blogspot.com/2010/06/details-for-ubuntu-1004-xorg-server-176.html