I get that with mozilla as well.

Steve Bellovin wrote:
> Galeon just died with this message:
> 
> assertion "PTQ_LAST(&pthread__runqueue, pthread_queue_t) != qhead" failed: file "/usr/src/lib/libpthread/pthread_run.c", line 241, function "pthread__sched_bulk"
> 
> I'm running 1.6ZE from 6 November.  And I don't remember the last time 
> I saw a thread-related problem, which is why this one was so noteworthy.
> I do not see any core files lying around.
> 
> 		--Steve Bellovin, http://www.research.att.com/~smb
> 
>