title: jQuery AJAX request failing in IE
body: <p>The following AJAX call is failing in IE.</p>
  
  <pre><code>$.ajax({
      url:"{{SITE_URL}}/content/twitter.json",
      dataType:"json",
      error:function(xhr, status, errorThrown) {
          alert(errorThrown+'\n'+status+'\n'+xhr.statusText);
      },
      success:function(json) {
                 ...Snip...
      }
  });
  </code></pre>
  
  <p>The error function returns</p>
  
  <pre><code>Undefined
  parsererror
  OK
  </code></pre>
  
  <p>No request is made to the server so I don't think its a problem with the JSON.</p>
  
  <p><strong>Fixed, See #1351389</strong></p>