jquery/jquery-ui — pull request #639 by tjvantoll (2012-04-25 02:45:31+00:00)
Title: Draggable: Don't run stop methods for elements that have been removed.  ...

...Fixed #8269 (http://bugs.jqueryui.com/ticket/8269)

I tried to come up with a way to unit test this but I couldn't get anything to work (it's dependent on a draggable being dropped on a droppable). Anyways, this fixes the test case in the bug and doesn't appear to have any adverse effects on the demos.