I don't have a True64 client to test, but FYI I have had weird results in
the past with the AIX gui if you don't have enough "colors" available for
your session.  It's an "X" thing ...you would have to ask a UNIX heavy for
more info about how X works, I've never understood it (and hope I never have
to :>).

Anyway, make sure he tries it on a workstation that has NO other GUI
applications open, to rule that issue out.