Has anyone had a hang at the "Building music databases..." boot stage? (at least since beta 9)

I've had it happen once or twice before, but now my unit is unusable (both in and out of the car).

I tried reflashing it, which worked. The unit then booted, I stuck it in the car and now it's back to hanging again. What's worse is that because, in car, it has a permanent power feed, you can turn the engine off and the empeg stays on. This means that when you pull it out of the dash you get a God awful bang out of the speakers. I hope like hell I haven't blown anything up.

Bryan, the depressed.

PS: I found Tonys' statement particularly prophetic.