I have a new iPod 80GB. I was listening to my iPod and it was in the shuffle mode. I was advancing through different songs and then it just froze. It's just stuck on "Now Playing" and the display shows the song, title etc. but it will not respond to any commands. It won't turn off. It is not playing the song. The screen is on but it won't change. I can hear the hard drive spinning. Any ideas? I just bought this at the end of October!