title: binding hashchange event in IE7 issue
body: <p>I am experiencing some issues binding to the hashchange event in Internet Explorer 7. All other versions of Internet Explorer - ie. 8 &amp; 9 work without issue.</p>
  
  <p>My code is:</p>
  
  <pre><code> $(window).bind('hashchange', function (e) { alert('hash changed'); });
  </code></pre>
  
  <p>When the hash of the url changes in Firefox, IE8, IE9 I get the alert box, but in IE7, nothing happens.</p>
  
  <p>Anyone experience this before?</p>