I had the "bailing out" problem. In my experience, it is totally bs to say that one should hang on after getting that message. If the N900 turned off, how long should you hang on? Six weeks or so would do no good.

What I did to get it to work was back up and completely reflash. Then it worked, I restored everything and it was fine. But getting "bailing out" over and over (which I did at first) didn't help a bit.