Video "snow" replaces displayed image?!

No, this is not a post about Snow Leopard! What I've found twice, at seemingly random intervals, is that the displayed image on either the internal MacBook Pro display or my external 23" Cinema Display (used with the MBP's lid closed) will be replaced entirely by video "snow." Fortunately, this goes away fairly easily if I move my mouse.
Has anyone else seen this?

There's a long thread on this topic. The problem has existed between MacBook Pro unibody laptops and Apple Cinema Displays and third-party displays since the MBP was released in late 2008
http://discussions.apple.com/thread.jspa?threadID=1760586&tstart=0

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Edited by: user10318332 on 13/12/2010 15:51
Edited by: user10318332 on 13/12/2010 20:10

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/Message was edited by:
luddite1812

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