Comment 8 for bug 341222

Same thing happen here.

My video card is an nvidia 8800gtx.

To avoid the problem, I have to start compiz manually from a terminal:

$ compiz >& compiz.out &

Then it works normally.

This bug has been reported since 20006 though ...

https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/73544