5.3-STABLE not saving panics ?

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    Hi,

I Have a server that keeps panicking when under some load, and I need to 
understand where the problem is. I've built a kernel with makeoptions 
DEBUG=-g, DDB, DDB_UNATTENDED. I've added dumpdev="/dev/ad3s1b" to 
rc.conf. But still, whenever it panicks, nothing will be logged to 
/var/log/messages (my 5.2.1-RELEASE workstation also logs panics there) 
and most important nothing will be in /var/crash/ ..

I can confirm it is indeed panicking because a friend brought the server 
from the datacenter to his home and we are testing it. I can easily make 
it panic by killing init, but even these will not be dumped to /var/crash/

Have I missed something obvious ?

(5.3-STABLE i386)