I see the same - and it doesn't have to be video. Listening to a Real Audio stream on the bbc.co.uk website using mplayer-plugin also leaves the phantom window. Restarting kwin (killall kwin && kwin) removes the phantom. KDE4 version of Kubuntu.
-- mplayer firefox plug-in problem with Desktop Effects enabled https://bugs.launchpad.net/bugs/194931 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
