Just got a 6th gen nano back from the 1st gen recall, and so far loving it minus one thing. When I elected a subset of my library and sync, it works just fine, but if I attempt to sync all my music (which WILL fit if converted to 128k) it performs the sync, then as soon as its safe to disconnect, it reboots. Then within 2-3 seconds of arriving at the home screen, reboots again, and is stuck in this loop until I can finally get it restored (a non-trivial task when its constantly resetting). Despite a restore, the problem will still occur if I replicate the steps outlined above.