title: Sortable elements centered using margin: 0 auto snaps to left while sorting
body: <p>I have a Jquery UI sortable where the sortable boxes are centered in their container using <code>margin: 0 auto</code>.</p>
  
  <p>I use the <code>axis: 'y'</code> setting in the sortable so that the boxes can only move vertically.</p>
  
  <p>While sorting, the dragged box moves to the left of the container </p>
  
  <p>Using draggable with <code>axis: y</code> does not cause this problem, it seems to be related to sortable widget.</p>
  
  <p>I replicated the bug in this <a href="http://jsfiddle.net/annam/35MC3/28/" rel="nofollow">jsfiddle</a>. Any ideas?</p>