I'm running beta six now.

When i turn the car on to accessory the display now comes on and the boot logo displays. But there it frezzes, with the boot logo on the screen, no music, no menus, no response.

Haven't tested the hang after short power loss (eg when starting engine) as commuting to work doesn't give the engine a chance to warm up. I'll be able to test that bugfix throughly this weekend while i'm away skiing at treble cone [http://www.new-zealand.com/TrebleCone/index.html] though.