ssh X11 forwarding not working on FreeBSD 6.2

[Lowell Gilbert]

I would guess that it's an xauth(1) problem.
Make sure that XAuthLocation is set ,in sshd_config(5), to the right
path for the xauth executable (probably /usr/local/bin/xauth, if
you've done the update to X.Org 7.2.

That's just a shot in the dark, though; the most certain way of
finding the problem is to increase the verbosity of sshd's logging,
and see what it thinks is wrong.