Draggable: helper doesn't get removed if draggable has been removed during drag

When a Draggable uses a helper, the helper is not correctly removed if the Draggable has been removed while dragging. An example can be found at jsfiddle. Unfortunately the example uses jQuery UI 1.8.7, which suffered from additional bugs around removal of Draggables while dragging. Reproducing the actual issue will require 1.8.9 or WIP code.

From what I can tell, the problem seems to lie in the following bit of Draggable (around line 197).

#!js
//if the original element is removed, don't bother to continue
if(!this.element[0] || !this.element[0].parentNode)
    return false;

Changing this to the following seems to help:

#!js
//if the original element is removed, don't bother to continue
if(!this.element[0] || !this.element[0].parentNode) {
    this._clear ();
    return false;
}