title: OnSelectedIndexChanged not firing in production - IE 11 only
body: <p>I have a  4.0 .NET site. I have the following element:</p>
  
  <pre><code> &lt;asp:DropDownList ID="ddlCounty" Width="250" AutoPostBack="true" runat="server"
   OnSelectedIndexChanged="ddlCounty_SelectedIndexChanged" /&gt;
  </code></pre>
  
  <p>This works when running locally in all browsers. Meaning, it hits the ddlCounty_SelectedIndexChanged function. In production, it works with all browsers, other than IE 11. In IE 11, it does not throw any JS errors, but never hits the server when the dropDownList is changed.</p>
  
  <p>I saw this fix: <a href="http://www.hanselman.com/blog/BugAndFixASPNETFailsToDetectIE10CausingDoPostBackIsUndefinedJavaScriptErrorOrMaintainFF5ScrollbarPosition.aspx/" rel="nofollow">IE 10 Fix</a>, which added 2 App_browser files to my project. I tried this, but it did not work. Furthermore, I have verified that it works correctly in IE 10.</p>
  
  <p>So basically, this issue only occurs in IE 11 (non compatibility mode).</p>
  
  <p>Anyone have an idea of what I should try next?</p>
  
  <p><strong>EDIT:</strong> additional code that was request:</p>
  
  <pre><code> &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt;
  </code></pre>