Movie player (the default media player in Ubuntu) couldn't find a codec or play a movie it I locked it in a box full of horny codecs just looking for a night out on the town with a video player.
Double click on an xvid, divx, or whatever file, Movie Player opens up and stupidly asks: "Search for suitable plugin?" If you hit 'Search' it never finds anything.
mplayer from the command line works fine. VLC works fine.
Why does Movie Player suck so much?
Or.... what did I not configure so that it will play stuff?