I'm running -current from yesterday morning's sources.  Mozilla (1.2.1, 
compiled after upgrading to -current) hung.  I sent it SIGTERM, and saw 
this on my console window:

assertion "0" failed: file "/usr/src/lib/libpthread/pthread.c", line 341, function "pthread__idle"
[5]   Abort trap (core dumped) mozilla -P smb -...

And I have a 42MB core file sitting in my home directory...

		--Steve Bellovin, http://www.research.att.com/~smb (me)
		http://www.wilyhacker.com (2nd edition of "Firewalls" book)