Does anyone know the cause of this? I have my ipod synced with iTunes 7.6.1 and with the latest iPod software as well. It's a 30 GB Video. If I don't use it for a few hours (this happens most often when I first turn it on in the morning) It restarts with the black apple screen then goes into the actually functionality of the iPod. It has been happening since I bought it and I have even received a replacement for it from AppleCare. Maybe its a file I'm syncing to it? Thanks for any and all help!