Mine rebooted itself the first time that I plugged it into a computer. It was running .65 at the time. I had killed the battery all the way to the point that it turns itself off. I then plugged it into the system and turned it on. A little bit later, it died while it was still charging and wouldn't turn back on. A little later, it turned back on. I didn't have a problem with it again until after I updated to .75. Since upgrading, I caught it rebooting on it's own once and found it just turned off once. Also, it rebooted itself again when I plugged it into the same system that I plugged it into before.