Same problem here on Ubuntu 8.04 and 8.10. But I do not have compiz enabled. But it is working on openSUSE 11.0 with Gnome 2.22, so this doesn't seem to be Gnome related.
Same problem here on Ubuntu 8.04 and 8.10. But I do not have compiz enabled. But it is working on openSUSE 11.0 with Gnome 2.22, so this doesn't seem to be Gnome related.