Michael Richardson writes:

 > Was the corefile from hostname called /etc/hostname.core?
 > 
 > If so, netstart would have tried to read it and ifconfig the
 > interface "core" up, with the contents of the file.

Oh dear oh dear.. That's *really* evil. ;-)

I'll bet that's it too, I did rm that useless corefile. Ten points to
you, sir. Wonder why it dumped in the first place..

--
Dan.