In message <20021109161313.GC5852@spathi.chuq.com>, you write: 

-> the PROM can be a pretty powerful debugger if you know how to use it,
-> but unfortunately I don't know very much about it.  "ctrace" tries to do
-> a stace trace, and ".trap-registers" shows a bunch of info from the
-> trap stack.  those might give you some clues as to what's happening.

Thanks for those hints, Chuck... If it hadn't been 4am and I hadn't been
up due to a nasty cold, I probably could have google'd for some Sun OFW
debugging tools at the time; this should at least give me a start next
time this happens.

--rafal

----
Rafal Boni                                                     rafal@attbi.com
  We are all worms.  But I do believe I am a glowworm.  -- Winston Churchill