Scriptaculous v1.8
Internet Explorer 6 and 7 throw an error when a draggable is set to ghosting = true.
It refers to line 410 in dragdrop.js, which is delete this.element._originallyAbsolute;. In Firefox it works just fine.
Changing this line to this.element._originallyAbsolute = null; removes the problem, but I am not sure if this is a) the right way and b) helps anything at all.
According to Surendra Singhi in IE draggable probably severe ghosting bug even the following code fails in IE:
<h1 id="test"></h1>
<script>
var x=document.getElementById('test'), fruit = new Object;
fruit.size = 'large';
delete fruit.size; //works fine
x.prop = 3;
delete x.prop; //throws error in IE6/7
</script>
