that's actually an improvement (before my old Xorg had issues with VLC in fullscreen even in metacity)
I used your exact xorg minus those 2 lines. which fixed some stuff, but I still have the problem of screen refreshes, and crashes.
playing a video in totem, and the top section of the video is pasted down below, over the controls.
Not sure if this is an Xorg problem, or something else.
but I really appreciate it, at least it helped metacity run better.
If anyone else could post their Xorgs, that might help, as we can all learn together, and maybe mix and match different ideas/options