Weird data error

Has anybody ever come across this in IE?
Message: 'data(...).options' is null or not an object
Line: 22
Char: 12801
Code: 0
URI: http://localhost/scripts/jquery-ui-1.7.2.custom.min.js
I'm using drag and drop and the draggable/droppable items are
utilizing the $.data() method, not sure if that's causing the problem
though.