[CentOS] xeyes kills freenx session

I was trying an assortment of things to get a remote X session working
(where I had forgotten to install the xauth package...) and noticed
that running xeyes kills my freenx session.  This happened whether in
the NX/freenx session itself or when  run on a remote machine via 'ssh
-Y', started from a window in a freenx session.  Is that a known
problem or do I have something set up wrong?   Other GUI programs that
open their own windows seem to work, including jconsole which is what
I really wanted to run in the first place.

-- 
   Les Mikesell
      lesmikesell at gmail.com