Sean,
Thanks for the tip.
I think the version I have has this patch in then, I'm running version: kamailio 3.1.2 (i386/linux) 63e528
For what it's worth, make sure you have the mhomed patch in forward.c. As I recall, the 3.1.2 source tarball did not contain the fix, but the latest forward.c did.
http://www.mail-archive.com/sr-users@lists.sip-router.org/msg03892.html