I had this bug, when opening the page in IE it always caused to crash. I was trying to use the sortables on a simple ul li. Here's the fix / the thing you shouldn't do when implementing....
/* ********* THIS FAILS!!!! ****/ <div id="sort"> <ul> <li class="sortableitem">1</li> <li class="sortableitem">2</li> <li class="sortableitem">3</li> </ul> <script type="text/javascript"> $('#sort ul').Sortable({ accept : 'sortableitem' } ) </script> </div> /* ********* THIS WILL WORK!!!! ****/ <div id="sort"> <ul> <li class="sortableitem">1</li> <li class="sortableitem">2</li> <li class="sortableitem">3</li> </ul> </div> <script type="text/javascript"> $('#sort ul').Sortable({ accept : 'sortableitem' } ) </script> Don't put the script to activate the sortables inside of any element of the item that you pass to the jQuery function (in this case <div id="sort"></div>). This will cause IE to crash. FF is still fine tho'... Anyway it's bad code. Put it to the document load function and you should be on the save side.