Resizable: Quickly moving stops resizing but still fires resize callback

In FF, Safari, and Chrome resizing and then quickly dragging outside of the resizable will stop it from resizing. Meanwhile the resize callback will continue to be fired while the object visibly does not change. Can easily be tested from demo:

http://docs.jquery.com/UI/Resizable

Just click, and drag quick up past the resizable and move your mouse. The resizable will not collapse all the way, and if you move the mouse left or right while outside the box no resizing happens. This works fine in IE and Opera.