I was playing scrabble and I got a 20% battery notice. My ipod froze, completely. Home button did nothing, power button did nothing. It was frozen for maybe 2-3 minutes and then reset. Tried to open scrabble and it would start and then bump back to the home screen, over and over. Had to delete it and reinstall it from itunes. Hopefully this isn't a problem that will happen again, but wanted to give fair warning, just in case it's a bug.