I have just downloaded and installed Theatertek to my HCPC, and have the following system : P4 1.8, sb 4.1 digital (SPDIF to my processor) , radeon 9000 card, powerstrip, barco 808 crt pj. I have the original drivers (which came on cd) for the sound card, latest cats for graphic card. Everything works fine except every 5 minutes or so I get what seems to be dropped frames, say 2 frames are lost as well as the audio, then it is fine. This is on ALL dvds, ntsc & pal. I dont see stutters during pans, it just seems to be around the 5 minute mark for a split second. I have checked and DMA is enabled on both hard and dvd drives, nothing else is running in the background, no lan card installed, i've tried the same dvds on windows media player and i havent noticed the same issue, i'll try power dvd tonight to see if this is hardware or software related. I've also asked this on the Teatertek forum but have had no response as of yet. Any ideas guys?