[CentOS] Total lockup caused by Shift-{print screen}

I just had the misfortune to press Shift-{print screen} accidentally
while in a Gnome desktop, and the result was a completely unresponsive
system where the only recovery was a power switch initiated shutdown.
Further investigation shows the runaway creation of gnome-screenshot
processes.

System is CentOS 5.2 fully updated on an Intel i686.

Suggestions about what component should receive the bugzilla report
are welcome.

-- 
Bob Nichols     "NOSPAM" is really part of my email address.
                 Do NOT delete it.