title: HtmlAgilityPack HtmlWeb.Load returning empty Document
body: <p>I have been using HtmlAgilityPack for the last 2 months in a Web Crawler Application with no issues loading a webpage.</p>
  
  <p>Now when I try to load a this particular webpage, the document OuterHtml is empty, so this test fails</p>
  
  <pre><code>var url = "http://www.prettygreen.com/";
  var htmlWeb = new HtmlWeb();
  var htmlDoc = htmlWeb.Load(url);
  var outerHtml = htmlDoc.DocumentNode.OuterHtml;
  Assert.AreNotEqual("", pageHtml);
  </code></pre>
  
  <p>I can load another page from the site with no problems, such as setting</p>
  
  <pre><code>url = "http://www.prettygreen.com/news/";
  </code></pre>
  
  <p>In the past I once had an issue with encodings, I played around with htmlWeb.OverrideEncoding and htmlWeb.AutoDetectEncoding with no luck.  I have no idea what could be the issue here with this webpage.</p>