When i use mozilla-mplayer to play media files with firefox beta 5 , on playing with ogg files found at some sites like
after playing there is a black shade on screen covering 3/4th of screen. Only way out is to restart / logout or kill x
There was no problem with firefox beta 4 even though the black shade was there it disappeared after navigating away from that page.
I am posting screenshot of my screen at the time of problem.