title: Jquery UI 1.9 breaks Asual address plugin
body: <p>Im using jQuery v1.8.2 and I just updated from jQuery UI 1.8.17 to 1.9 and the address plugin from <a href="https://github.com/asual/jquery-address" rel="nofollow">https://github.com/asual/jquery-address</a> doesnt work anymore.</p>
  
  <p>This is what I have</p>
  
  <pre><code>$.address.change(function(event) {
      $("#tabs").tabs("beforeActivate", window.location.hash)     
  });
  $("#tabs").bind("tabsactivate", function(event, ui) {
      window.location.hash = ui.tab.hash;
  });
  </code></pre>
  
  <p>I get an error on the consolog log</p>
  
  <pre><code>Uncaught TypeError: Cannot read property 'hash' of undefined 
  </code></pre>
  
  <p>I cant seem to find the root of the problem. Could anyone help me find out what jquery 1.9 changed, because ive been reading docs and cant figure it out how to fix(update) it.</p>
  
  <p>Thanks</p>
  
  <p>EDIT: I replace ui.tabs.has with ui.newTab.hash and now it get an #undefined hash</p>