ifconfig carp0 destroy = kernel panic

This is an old problem with FreeBSD 6.x.

Three questions:
 Why has this not been patched in the CVS tree?
 Is there a solution that works?
 Should I be posting this to freebsd-questions?

I tried this patch:
 http://lists.freebsd.org/pipermail/freebsd-current/2005-August/054543.html
and the machine panics after an ifconfig carp0 destroy.


Haven't tried this:
 http://lists.freebsd.org/pipermail/freebsd-stable/2007-February/032839.html

Someone else reported the issue as well, and someone else offered a patch:
 http://lists.freebsd.org/pipermail/freebsd-pf/2006-August/002501.html
But I never saw any patch.

Thanks in advance,
Rudy