Bug or User Error in HTML Tidy

Hello,

I have been using HTML Tidy to verify my code and it keeps returning a
warning that I don't understand.  If you could please look at the screenshot
and let me know what I am doing wrong I would appreciate it.

Thank you,

 <<screenshot.gif>> 
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Steve Sprinkles
Lead UI Design
Valdero (formerly BizAgile)
650.404.2242
ssprinkles@valdero.com
http://www.valdero.com/