If you use the ghosting sortable feature of script.aculo.us you've may noticed that, if you use it with IE7, the active dragable disappears by the fist drag-action.
If you release the dragable and try it again it will stay visible.
After a long search I've found out that in prototype.js the method Position.absolutize uses element.clientWidth / element.clientHeight to recognize the dimensions of the active dragable. But if the element is relative positioned and no height is specified, IE7 will detectd height 0. FF and IE 6 instead would get the "real" dimensions of the element.
Now I've changed the this code [line 3221]:
var width = element.clientWidth;
var height = element.clientHeight;
to this:
var dimensions = element.getDimensions();
var width = dimensions.width;
var height = dimensions.height;
During my own testing everything works fine with this change. But I don't now so much about prototype, maybe I've implementet with this change a real bug ;)
