"This may be a very unique situation, but I wanted to share it since I know many folks made registry tweaks to stop what we call "Vista disk trashing". I've been having issues with every single one of my Zune audio tracks on my Samsung Q1P: regardless of the song length, the audio skips precisely 20 seconds before the end of the song. It's terribly annoying as I use the great sound of the Q1P all day long to listen to music I've downloaded from the Zune Marketplace with my Zune Pass subscription. My guess is that most folks don't use a UMPC as their portable "Zune server" like I do: I store my tunes on the Q1P and sync the Zune hardware to it. Turns out the problem is easily resolved..."
Those guys over at jkOnTheRun seem to find the most unique computer problems - I think they went to the same school of geekdom that I did - but I figured I'd link to this on the off chance that any of you are having the same problem.