You probably won't like this suggestion, but have you thought of switching off of FreeBSD? Maybe just for testing?
I don't see this behavior under Solaris or (Debian Woody) Linux.
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/TSS/Computing Systems ITSS/TSS/Infrastructure Operations Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html