I have a 4th (?) generation 20 GB iPod with firmware 3.1.1. Occasionally following a recharge, the unit will continuously skip tracks. I press play, and watch as the tracks scroll by, about two per second.
When I plug the unit into my iBook and re-sync it, the tracks play as normal. Updating the iPod didn't move any tracks; all that happens is iTunes says "Updating iPod" for a few seconds then is finished.
I've reset the unit and did a full re-sync, but I still get the occasional problem.
Any ideas?