XML parsing failed: syntax error (Line: 27, Character: 37)

Reparse document as HTML
Error:invalid start-tag
Specification:http://www.w3.org/TR/REC-xml/#NT-STag
 24: 			</ul>
 25: 			<p>
 26: 				<a class="image" href="http://validator.w3.org/check?uri=referer">
 27: 					<FONT size="1">[AD]</FONT><AD- /www.w3.org/Icons/valid-xhtml11"
 28: 					     alt="Valid XHTML 1.1" height="31" width="88" /></a><br />
 29: 				<a class="image" href="http://jigsaw.w3.org/css-validator/check/referer">
 30: 					<img class="Button" style="border:0;width:88px;height:31px"