Recently my video codecs went a little haywire and I had to download and reinstall a whole new pack. I did this with the k-lite mega codec pack, and now all my avis and mpegs are working again. However, I noticed that now when I try to play dvds on my computer, the picture has this strange quality where any onscreen movement is jumpy, almost like its vibrating. It's incredibly distracting and actually gives me a headache if i watch it too long. Im assuming that it's related to the codecs reinstallation, because I previously had no problems with watching dvds. I'm running a windows xp media center computer with an ATI Radeon x300/x550x/x1050 video card. any advice would be much appreciated.