Comment 2 for bug 306647

No I've never ran Ubuntu with compiz disabled completely...but because of the other bugs I have out...I'll leave it off for a few days to see if I can duplicate this. However, I'm pretty sure it might be a problem with Compiz and Firefox content-update integration (or whatever category it really is :D) I'm pretty sure this problem has only happened when I'm workspace switching. I'll flag this bug as incomplete for now.