title: Unobtrusive Ajax stopped working after update jQuery to 1.9.0
body: <p>I have just updated jQuery &amp; jQuery UI to:
  jquery-1.9.0.min.js and 
  jquery-ui-1.9.2.min.js</p>
  
  <p>And... all my unobtrusive Ajax calls (Ajax.ActionLink, Ajax.BeginForm) stopped working properly - they open results in a new page instead of updating the existing div.</p>
  
  <p>And I get this javascript error in Firebug when my page loads:</p>
  
  <p><img src="https://i.stack.imgur.com/W9tc2.png" alt="enter image description here"></p>
  
  <p>Code hasn't changed of course, just updated the jQuery scripts using Nuget.</p>
  
  <p>Anyone experienced the same problem ??</p>