IE issues with drag/drop (script.aculo.us)

Question

I have a page with a left and a right div. Inside each of these there are several divs. I can drag&drop them inside the left/right divs or move from one to the other

So the page is something like

........ ........ ........ ........

I am using scriptaculous and prototype for the drag&drop

If I drag in Firefox things work fine. In IE6-IE8 however I have 2 problems:

1) When I drag from left to right or the other way around, the inner divs do not keep their relative distances: the div I moved now overlaps with the div on the opposite side (if I do a reload of the page the divs are set correctly again)

2) If I shrink the window width below a certain width the divs either on the left or the right droppable disappear.

Any ideas?

deb