Drag & drop of dialog causes jumping behavior

[Sebobo]

Once dnd worked fine except a little flickering when the dragged clone disappeared and the original reappeared. But then it broke as suddenly the clientY values reported at the dragend event were suddenly incorrect. So I now use the drop event on the parent which provides the correct coordinates.

In safari it works fine now but in chrome the clone has some offset when start dragging, but I don't know how to influence that one. Probably some effect from another CSS thing.