Mplayer GUI not working

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http://forums.fedoraforum.org – I've been using mplayer for a long time with several distros, and I like it. I'm running Fedora 16 with XFCE 4 on a 64 bit machine. I can use use mplayer from the terminal and it works fine: reuven@ReuvenFedora:/$ mplayer -fs -playlist [path/filename] But when I open the GUI interface, when I hit play the window which displays the video dissappears and I hear the sound, but no picture. Any ideas how to fix that? Reuven (HowTos)