Originally Posted by RobotMarvin
Has anyone also noticed that video playback under Gnome 3.x seems somewhat jerky as well? It is not as smooth (apart from the tearing line) as it is with KDE4 and composition on for example.
Hopefully we can get this resolved soon.
Make sure you don't have gnome-shell-extension-cpu-temperature installed. I also added -cache 10240 to mplayer. For the long story about the cpu extension, please read https://bugzilla.gnome.org/show_bug.cgi?id=664869