I’ve noticed in the comments that a lot of people are having trouble with a blue / white tinge on video when using the mPlayer patch.
If you are not using a patched up Xgl (Allowing RBG -> YV12 colorspace conversion), try enabling / disabling ‘Use YV12 Colorspace’ on the video plugin
Make sure the video plugin is loaded too 🙂
Alternative Fax 
No good, makes no difference whether YV12 is on or off, I still get the blue tinge.
No problem for my with Nvidia driver
Other question, what about a patch for the mythtv native player ?
I have tried at home with an ati old card and it is working fine. But suddenly it only works when the mplayer is not on full screen. In full screen I only get a blue screen.
Using gconf-editor set option ‘/apps/compiz/general/screen0/options/unredirect_fullscreen_windows’ to false, it will work fine when mplayer playing in full screen.