Thanks for your help, but that didn't work either. It plays as though frames are missing. still choppy, or the same same speed as without the fix.

I'm interested in that "Tiling" fis you presented. I wonder why my screen freezes? The mouse moves but nothing works.

Everything works perfectly using the old Harty xorg.conf, EXCEPT no video movies. Screen refreshes fast I can surf the net with speed scroll through docs fine. Its just when I try and play any movies that any player crashes.