Please note that gconf-editor is the wrong tool for this in 12.10, as compiz has been ported to gsettings. This sounds like a likely duplicate of bug 1063617. You could try to install gnome-shell and check if that bug also happens with that; if not, it's a rather definitive duplicate.
Please note that gconf-editor is the wrong tool for this in 12.10, as compiz has been ported to gsettings. This sounds like a likely duplicate of bug 1063617. You could try to install gnome-shell and check if that bug also happens with that; if not, it's a rather definitive duplicate.