I used to use smplayer but after upgrading from Ubuntu 9.04 to 10.04 picture became transparent and invisible, so I went ahead and tried reinstalling smplayer.
However, it just crashes whenever I try to run any movie.
I can play the same files with VLC or naked mplayer without any problems.
There is more details on this page: http://ubuntuforums.org/showthread.php? ... 81&page=27
but noone there was able to help me.