If you really want to install the version from experimental before this bug is fixed, you can force it as follows (and it's really not a good idea) :
cp /usr/share/compiz/grid.xml /usr/share/compiz/grid.xml.orig aptitude download -t experimental compiz-fusion-plugins-extra dpkg --force-overwrite -i compiz-fusion-plugins-extra*.deb -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org