Website kommt nicht durch den Validator?

[Thomas Seitz]

Hallo
meine Webseite kommt nicht durch den Validator
ES wird folgende Fehlermeldung vom Validator angezeigt:
Line 20, Column 4: character data is not allowed here

		<li><a href="index.php">Über mich</a></li>  

<li><a href="index.php">Über mich</a></li>

You have used character data somewhere it is not permitted to appear. Mistakes that can cause this error include:

* putting text directly in the body of the document without wrapping it in a container element (such as a <p>aragraph</p>), or
    * forgetting to quote an attribute value (where characters such as "%" and "/" are common, but cannot appear without surrounding quotes), or
    * using XHTML-style self-closing tags (such as <meta ... />) in HTML 4.01 or earlier. To fix, remove the extra slash ('/') character. For more information about the reasons for this, see Empty elements in SGML, HTML, XML, and XHTML.

Hier ein Ausschnitt meines Quellcods

<div id="navigation">  
		<ul>  
			<li><a href="index.php">Über mich</a></li>  
			<li><a href="#">Projekte</a></li>  
			<li><a href="galerie.php">Fotogalerie</a></li>  
			<li><a href="manual.php">Manuals</a></li>  
			<li><a href="#">Impressum</a></li>  
		</ul>  
	</div>