title: jQuery .effect('shake') doesn't work on Safari and Firefox
body: <p>I made this: <a href="http://jsfiddle.net/jalxob/ahQLC/18/" rel="nofollow">http://jsfiddle.net/jalxob/ahQLC/18/</a></p>
  
  <pre><code>    $( ".formbox" ).effect('shake', { times:2, distance:5 });
  </code></pre>
  
  <p>It works well on Chrome but not in Safari and Firefox. </p>
  
  <p>Can someone please help me? </p>
  
  <p>If you check on Safari you will notice that when the all or one of the inputs are not filled, a red shadow around the input appears and the container divs shakes a little. The red shadow doesn't appear and the shaking changes dramatically on Safari and Firefox.</p>
  
  <p>Thank you :)</p>