is valid?      

Text formatted with Texy:

<fb:fan profile_id="111794865510398" stream="0" connections="0" logobar="1" width="300"></fb:fan>
Volební billboardy on Facebook

Generated HTML code:

<script type="text/javascript"
src="http://static.ak.connect.facebook.com/connect.php/cs_CZ"></script>
<div id="fb-root"></div>
<script>window.fbAsyncInit = function() {  FB.init({    appId: "111794865510398",    xfbml: true  });};(function() {  var e = document.createElement('script'); e.async = true;  e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js';  document.getElementById('fb-root').appendChild(e);}());</script>&lt;fb:fan
profile_id="111794865510398" stream="0" connections="0" logobar="1"
width="300"&gt;&lt;/fb:fan&gt;
<div style="font-size:8px; padding-left:10px"><a
href="http://www.facebook.com/pages/Volebni-billboardy/111794865510398">Volební
billboardy</a> on Facebook</div>

Verze Texy: 3.1.5 (konfigurace)