Thanks SmokerMan, Responding to anything whle hungover is above and beyond.

I think I found the solution. The full installer at http://jempeg.sourceforge.net still uses jempeg-0.9.13.jar. This is what I was using. The fix was to get "jempeg-0.9.14.jar".
http://sourceforge.net/project/showfiles.php?group_id=12943&release_id=16800

--Glenn Beer (the lack of spell checking is the biggest broblem with bbs systems like this. I wonder what it would take to add spellcheck highlighting to the preview post function.)