Sortable: Incorrect behaviour (or incorrect documentation) of sortable option tolerance: 'intersect'

Here's what the docs sais about the tolerance option:

intersect: draggable overlaps the droppable at least 50%

But if the mouse pointer is not above the sortable items, the sort does not happen, no matter that the dragged element is at least 50% over another sortable item (the functionality I expect) This happens on the demo page as well, tested on all major browsers. It is even more annoying if the drag is restricted on one of the axis.

Here is an example:

http://jsfiddle.net/8hjhV/3/

Here is the expceted behaviour (sort should occur if the dragged element overlaps anouther sortable element, even if the mouse pointer is not over that element) with a workaround solution

http://jsfiddle.net/8hjhV/2/