UI Sortables Intermittent Error

UI Sortables Intermittent Error


Hi there,
I have hooked up a draggable list to a 3 column sortable list using _
connectToSortable:'.column',    _
it works well but every now and then I get an error kicked back in
Firefox saying the following....
this.parentNode is null
referring to jquery-1.3.2.js (line 268). which is as follows
before: function() {
return this.domManip(arguments, false, function(elem){
this.parentNode.insertBefore( elem, this );
});
I could only find a mention of this once or twice before and it
doesn't seem to be a know issue
anybody else experienced/resolved this before?
Thanks for your help,
Darren