While this does leave people locked out of their session, this isn't a security bug, and have unflagged it.
** This bug is no longer flagged as a security issue -- installing compiz will make using metacity impossible (even after uninstalling) https://launchpad.net/bugs/87960 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
