Recently, I found that my N900 reboots unexpectedly very often. it usually happens after I finish a phone call (receiving calls seem to be ok.) I just found that the last boot reason is 32wd_to. The firmware running on my system is PR 1.3. One application that I run a lot when the crash happens is Dorian. I don't know if it has anything to do with the crash.

Anyone have any idea how I can fix this?
Thanks.