I have the same problem, when I play video, with vlc,totem even in youtube.
My nvidia is nVidia G84 [GeForce 8600 GT] [10de:0402] (rev a1) Driver 260.19.06 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to nvidia-graphics-drivers in Ubuntu. https://bugs.launchpad.net/bugs/777669 Title: Invisible window blocks mouse interactions with visible windows after upgrading to 11.04 To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/777669/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp