title: Why is ajax-loader.gif attempted to be loaded instead of ajax-loader.png?
body: <p>I have installed jQuery mobile locally.</p>
  
  <p>When I invoke the method : <code>$.mobile.showPageLoadingMsg();</code> I receive an error message : 
  css/images/ajax-loader.gif 404 (Not Found) </p>
  
  <p>The file css/images/ajax-loader.png does exist. Should this method not be referring this file instead ?</p>
  
  <p>A possible solution is for me to just add my one ajax loader with same name, but it should work out of box ?</p>