title: What's wrong with this XPath query?
body: <p>I'm trying to select nodes from an rss feed.  It works fine for Twitter, but I can't do it on Youtube.</p>
  
  <pre><code>        string youtube = "http://gdata.youtube.com/feeds/api/users/CTVOlympics/uploads";
          string twitter = "http://twitter.com/statuses/user_timeline/ctvolympics.rss";
  
          //this populates the XmlNodeList object
          XmlTextReader readerTwitter = new XmlTextReader(twitter);
          XmlDocument docTwitter = new XmlDocument();
          docTwitter.Load(readerTwitter);
          XmlNodeList nodesTwitter = docTwitter.SelectNodes("/rss/channel/item");
  
          //this doesn't populate the object
          XmlTextReader readerYoutube = new XmlTextReader(youtube);
          XmlDocument docYoutube = new XmlDocument();
          docYoutube.Load(readerYoutube);
          XmlNodeList nodesYoutube = docYoutube.SelectNodes("/feed/entry");
  </code></pre>
  
  <p>any ideas?</p>