title: jquery mobile data-rel= back troubles
body: <p>My problem is that im usign JQM and I have a back button on each site. </p>
  
  <pre><code>&lt;a data-rel="back" data-role="button" data-inline="true" data-icon="arrow-l" data-transition="slide" data-direction="reverse" data-iconpos="notext"&gt;&lt;/a&gt;
  </code></pre>
  
  <p>At several pages it goes back and at other pages I can't go back with the button.
  It shows me always that error in the console (it is a jquery mobile error). I'm googleing since a hour or 2 and I have only founded, that this bug was a chrome bug and it is closed.. (chromium)</p>
  
  <p><strong>Uncaught TypeError: Cannot call method 'indexOf' of undefined</strong> </p>