[FC3] Differences in ssh or Xauthorization...

[Harry Putnam]

In past versions I've been able to access root while in $user X
session like this:
  xterm -e ssh root at localhost

That would bring up an xterm with a password request.  Once logged in
this root xterm would then have priviledges to run X applications in
users X session.  It could start its own `netscape' session for
example.

I don't normally run netscape as root but am using it here for a clear
example.  The real apps I'm having this problem with are things like
emacs or gvim.  

In FC3, when I do this, the root xterm cannot get access to my user
display.  I get errors like:
  Gtk-WARNING **: cannot open display:

I know about `xhost' and the X11 forwarding of ssh (which is set to
YES) but in the past nothing like that was necessary.

Anyone know what changes are causing this?