Thanks guys! I don't think I'll really need to shuffle, so that's okay.

From part of the help file:
"Rewind
Rewinds the current clip. Only available with certain types of stored (not live) media."

Argh. That's annoying. I've quickly gone through and tested half of my music videos, and none of them allow you to FF or REW through them. Hell, it doesn't even work on WMV files! If the damn help told me what those types of media were, I might even go through and re-encode them all.