Kernel Panic (obelix)

[bsd at perimeter.co.za]

Hi folks! 

I have had two kernel panics in quick succession, after being stable for 6 
months.  Strange.... 

The box is quite up to date on the 4 Stable branch: 

 # uname -v
 FreeBSD 4.9-RELEASE-p1 #0: Fri Nov 28 09:49:42 SAST 2003
 peri at obelix.perimeter.co.za:/usr/obj/usr/src/sys/obelix 

Suddenly it has crashed twice in less than 8 hours.  The last crash was Dec 
9 16:09. 

I have put a stack trace from gdb at 
http://docs.perimeter.co.za/crash/2003-12/20031209_1609_a. 

Any pointers would be much appreciated. 

Regards,
Patrick.