title: Why this XML (RSS) fails on IE7/Validator?
body: <p>I have this XML :</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt;
  &lt;rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"&gt;
      &lt;channel&gt;
          &lt;atom:link href="http://www.montagnaconamore.it/rss/news.xml" rel="self" type="application/rss+xml" /&gt;
          &lt;title&gt;Adamelloski&lt;/title&gt;
          &lt;link&gt;http://www.adamelloski.com/&lt;/link&gt;
          &lt;description&gt;eventi del sito adamelloski.com&lt;/description&gt;
          &lt;generator&gt;Archimede 1.0 (http://www.archimede.nu/)&lt;/generator&gt;
          &lt;language&gt;it-IT&lt;/language&gt;
          &lt;item&gt;
              &lt;title&gt;&lt;![CDATA[Corso di Cucina Antiaging]]&gt;&lt;/title&gt;
              &lt;description&gt;&lt;![CDATA[&lt;div id="imgOfferta"&gt;&lt;a target="_blank" href="http://www.montagnaconamore.it/interne/eventi.aspx?ID=4928&amp;amp;IDE=6350"&gt;&lt;img border="0" src="http://www.montagnaconamore.it/images/eventi/Eventi Estate 2011/miniature/corso_cucina_my_vitalis_220x110.jpg" alt="Corso di Cucina Antiaging" class="imgOfferta"&gt;&lt;/a&gt;&lt;/div&gt;&lt;div id="dataOfferta"&gt;Dal 02/10/2011 al 02/12/2011&lt;/div&gt;&lt;div id="testoofferta"&gt;A Folgaria, al My Vitalis Nature Hotel ****, dal 2 ottobre al 2 dicembre, corsi teorici e pratici su un uso bilanciato e rigenerante dei cibi per uno stile di vita salutare antiaging!&lt;/div&gt;]]&gt;&lt;/description&gt;
              &lt;link&gt;http://www.montagnaconamore.it/interne/eventi.aspx?ID=4928&amp;amp;IDE=6350&lt;/link&gt;
              &lt;pubDate&gt;Mon, 19 Sep 2011 22:00:00 GMT&lt;/pubDate&gt;
              &lt;guid isPermaLink="true"&gt;http://www.montagnaconamore.it/interne/eventi.aspx?ID=4928&amp;amp;IDE=6350&lt;/guid&gt;
          &lt;/item&gt;
      &lt;/channel&gt;
  &lt;/rss&gt;
  &lt;/xml&gt;
  </code></pre>
  
  <p>if I try to open on IE7 it fails : "feed contains error".
  With <a href="http://www.validome.org/xml/validate/" rel="nofollow">this</a> validator I get :</p>
  
  <pre><code>&lt;rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"&gt; 
  &lt;/xml&gt; 
  </code></pre>
  
  <p>What's happened?</p>