Sortable: position off when container scrolled horizontally

[shhQuiet]

See the fiddle: ​http://jsfiddle.net/shhQuiet/t2vnfmh4/4/embedded/result/

Resize the fiddle screen until you see a horizontal scrollbar. Scroll all the way to the right and then trying dragging the elements. Their horizontal position is still retained from the initial position.

I have tried to mitigate the issue with no luck by adding this:

$('#scroller').scroll(function() {
    $('.items').sortable("refreshPositions");
});

[tj.vantoll]

Thanks shhQuiet.

I'm pretty sure this is a duplicate of #5039, but I'm not positive so I'll leave this open for now.