perl core dump with spamassassin via procmail

[Brian]

I've been battling these for a couple weeks, I was running 5.4 stable 
with perl 5.8.7, now stable has gotten me to 5.5 prerelease and the perl 
version is 5.8.8.  At any rate, my procmail log does this 
intermittently, not for every message.

procmail: Program failure (-11) of "/usr/local/bin/spamassassin"
procmail: Rescue of unfiltered data succeeded

I don't see any notes for what the numbers mean, what can be done.

Brian