I've got the latest downloadable firmware (796 I think) and three or four times in the six months I've had the thing it has frozen while booting up - , it's frozen on the startup screen (The screen with Bill Clinton and all the little books on).
Only prodding at the reset switch while plugging/unplugging from the computer made it spring to life. Simple pressing of the reset button didn't work.
Recently, I've stopped using auto-off and turned the cybook off manually every time, and haven't had the freeze up since.
On the post hoc ergo propter hoc principle, I've linked the two facts and concluded that the auto-off feature enables it to get its software in a twist and causes the freeze-ups.
Do all those with freeze problems use auto-off, or is my theory flawed?