Instead of the usual UI, I got a no-frills list of testing and debugging options. I played around for a bit, but really I just wanted to listen to NSYNC. So, I did the magic restart-your-iPod button combination, and all was right in the world. Peculiar, eh?
If you want to put your iPod into the fancy diagnostic mode, here are some instructions.
I’m kidding about NSYNC, okay?