title: jQuery ajax callback never called
body: <p>Javascript code, using jQuery 1.7:</p>
  
  <pre><code>$( function() { 
    $.get('/ajax_dummy', function() { alert('foo');  })
  });
  </code></pre>
  
  <p>With Firebug I can see that the HTTP GET request is sent and a "hello world" response with code 200 is returned, so everything seems fine. But the callback is never called. </p>
  
  <p>I have no idea what is wrong; this should be so simple, right?</p>