title: jQuery Position() doesn't accurately follow draggable element
body: <p>I want to have an element B following element A when A is dragged. I use draggable from jQueryUI. </p>
  
  <p>I made this:
  <a href="http://jsfiddle.net/7KhSS/" rel="nofollow">http://jsfiddle.net/7KhSS/</a></p>
  
  <p>It works, but isn't really accurate. While B is following A, ther often is a 1px-3px gap either horizontally or vertically.</p>
  
  <p>I can't nest element B inside element A (which would solve the current problem), because in my case, element B has fixed positioning.</p>