I hope I'm just missing a package or something. When I play a .avi file the sound is ..... well, not good. Very choppy, scratchy and add whatever you like to the list. I've tried gnome-mplayer, kaffiene, vlc and others.
BTW, I've also noticed that I can't resize .mpegs either. I can resize them, and the window gets bigger, but the movie stays the same size.