i have duplicated this problem many times with aac tracks encoded at 128 from a cd (no DRM) and tracks from itms (w/ DRM) but i couldn't get it to freeze with mp3. when i am playing a track and i press play/pause at the very end of the track to pause it, the ipod locks up. It clicks if you push the buttons but not if you spin the scroll wheel. I was able to get out of it by holding the menu and play buttons but i want to know if this is an error with the software on all ipods or if mine is broken and i should get a replacement. Is it covered by the one year warrenty and is this enough to get a replacement? The ipod is a 3G 10GB and the version of the software is 2.2.