Fixed size Sortable with overflow:auto does not scroll

Fixed size Sortable with overflow:auto does not scroll

I have a Draggable list of items that get cloned into a Sortable. The Sortable is a fixed size, after which it scrolls. I have not been able to get the Sortable to scroll down if someone wants to drop an item from the Draggable into the Sortable. I have tweaked and played with all sorts of options in various combinations (scroll*,  attachTo, refreshPositions, containment) and had no luck. Here is an example:  http://jsfiddle.net/PsFT8/

Is this possible at present? I came across this bug which sounds similar, as well as some other forums posts with no answers or people suggesting that the author's weren't clear enough:  http://bugs.jqueryui.com/ticket/5684.

Thanks for any help,
Nick Spacek