I have a 20 GB iPod (4th generation? Last one before the color iPod was released) with the latest firmware. Occasionally when playback is started the unit will rapidly skip over tracks; it looks like it tries to play a track for a second, then goes to the next, then the next, etc., like it can find the title information but not the music track itself, so it goes to the enxt one.
Plugging it into my iBook and starting iTunes fixes it, but then it will do it again later on, necessitating the plugging in with iTunes again.
Anybody else see this? Any ideas on how to fix it?