[Omega Ra]

yes rotation does get shut off when power gets low, but that usually isn't until like 20% or something...so not quite sure it is doing it to you at 40..

and for the guy who is stuck on the omnia boot screen, try a manual hard reset. When pressing in soft key press and hold the send and end keys (toward the outside of the buttons so the center won't get pressed accidentally) and wait until it asks to format and hit yes. See if that works.