In this fiddle (http://jsfiddle.net/YS4Ce/) if you try to drag around the smaller elements in the smaller grid inside the "0" element of the bigger outer grid, you will notice that the placeholder's size has the base dimensions of that of the outer grid instead of the inner grid.
In this fiddle (http://jsfiddle.net/YS4Ce/) if you try to drag around the smaller elements in the smaller grid inside the "0" element of the bigger outer grid, you will notice that the placeholder's size has the base dimensions of that of the outer grid instead of the inner grid.