title: jQuery animate += and latest version
body: <p>Each time I click the div "blue" it moves 100px. It worked well and one day I realize it stopped working. After trying a lot of things I discovered that the problem is with the latest version of jQuery 1.10 Now it just moves 100px once. It is as it ignores the += . I could not find if it is deprecated? If so, what is the right way to do that now?</p>
  
  <p>You could see it working here:<a href="http://jsfiddle.net/RB4eJ/1/" rel="nofollow noreferrer">http://jsfiddle.net/RB4eJ/1/</a><br>
  (This is working in jQuery 1.9.1. But it is not in 1.10)</p>
  
  <pre><code>$(function(){
      $(".blue").click(function() {
          $(".blue").animate({left: "+=100"}, 500)    
      });
  })
  </code></pre>