I just ran into the exact same problem today with the HiQ video set. They play fine and full screen outside of Mala, but once in Mala, they are running half the speed. I also have the lower quality videos that will play full speed in Mala though. It's a 1.10Ghz Athlon XP machine. I only have the latest Xvid codec installed. Not sure what else to do besides switch out video cards.