It happens when compiz is enabled because that's the only time gksu tries to make a translucent window. Probably a GTK+ issue in reality though.
** Package changed: compiz (Ubuntu) => gksu (Ubuntu) -- ambiance authenticate dialog looks bad https://bugs.launchpad.net/bugs/543186 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs