I'm posting this for the archive in case someone else runs across this
PROBLEM: Under X11, ncl requires that backing store be turned on
and note that the XF86Config references need to be updated now that xorg
is the default on most Linux distributions).
However, the vncserver that comes with Redhat Fedora Core 3
silently suppresses this change, since it is compiled with a version
of Xvnc that doesn't have backing store turned on.
SOLUTION: For Fedora core 3, at least, switch to tightVNC-server,
(tightvnc-server-1.3dev7-1.i386.rpm from http://www.tightvnc.com/download.html).
This turns out to be a particularly hard problem to debug if you're working
at home using vnc ;-)
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