snmpd exited on signal 11 (core dumped)

Hello,
I got this problem:
Sometimes, maybe once a week, snmpd crashes on one of my servers and I'll have to start snmpd again.
When checking the syslog all I find is:

Dec  1 16:17:48 server /kernel: pid 278 (snmpd), uid 0: exited on signal 11 (core dumped)

I have no idea why this is.

FreeBSD 4.11 and snmpd from ports:

bash-2.05b# pkg_info | grep snmp
net-snmp-5.2_1      An extendable SNMP implementation

Any ideas?

Best Regards
Goran