li and ul W3C compliancy

Hi,

I'm getting a compliancy error form the following code, however i read that it was ok to do this?

<ul>
	<li class="head"></li>
	<li>
    	<ul>
			<li class="avatar"></li>
			<li class="text"></li>
		</ul>
	</li>
</ul>

HTML:

 

What is your document type?

 

Try it this way:

<ul>
<li class="head">text
<ul>
<li class="avatar">text</li>
<li class="text">text</li>
</ul>
</li>
</ul>