FYI, I also moved to the latest and "greatest" 1.41 radio rom and noticed the following issues
- phone radio shuts down once every few hours
- phone radio shut down once when I hung up on a call (pressed end)
- battery life = crap (I guess the radio is just burning current when its in some broken crazy state)
Anyway, I'm going back to a more stable radio rom ... this thing is firstly a phone you know