I have a core dump on 5.4.1 which does not occur on 5.4.
I am unsure of the exact cause, however I suspect it is something to do with handling of GRE tunnels.
My OS is Gentoo Linux, and this happens on both an x86 and amd64 environment.
My problem looks basically like one described here:
http://fixunix.com/snmp/241866-issue-starting-snmpd-daemon-net-snmp-5-4-a.html
At least, the 5th...
2007-12-24 16:49:25 UTC in net-snmp