title: X-Requested-With/HTTP_X_REQUESTED_WITH weird problem
body: <p>I'm building a Django site and trying to use the <code>request.is_ajax()</code> function... But <strong>it's only working <em>locally</em></strong> and it's driving me crazy!</p>
  
  <p>I'm at the point where I've just dumped the headers. Here (on the django test server) there's <code>HTTP_X_REQUESTED_WITH</code> but on the production server (cherokee+scgi) all I get is <code>X-Requested-With</code>.</p>
  
  <p>I've used firebug to snoop the <em>sent</em> headers and it's <code>X-Requested-With</code> (on both versions of the site). I'm very, <em>very</em> confused. Can anybody explain what's happening and how I can work around it without losing my mind?</p>