I don't know when it happened, since it's been a while since I played a DVD, but now when I try to play a DVD, the sound is all scratchy as hell. You almost can't hear the audio through the static.
I'm sure I've had this problem before, but I was running Windows 98 at the time, which tells you how long ago that was...I think I fixed it by turning DMA off on my DVD drive, but I can't find the option in 2k/XPee.