Small video in mplayer (suddenly!)
 

I think mplayer has gone mad! It plays normally all videos (s it did) but now when i change to fullscreen the video window stays @ the same size and the whole background turns black!I I think this has to do with the xv problem under fedora core 2, but what can i do to correct this?Plz help me cause i c a lot of videos under linux!

Try this:
mplayer -vo xv your_file
If you still get that problem, try:
mplayer -vo help
And select one.