I have the exact same issue. Video works fine, but it leaves this "window" on the top left of the screen. Running kde4 Hardy beta, with kwin desktop effects enabled.
-- 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