Sortable tolerance + performance issues compared to 1.5beta!

Sortable tolerance + performance issues compared to 1.5beta!


Hi
Have been upgrading a script that I wrote quite a few months back
using 1.5beta to the latest version 1.6rc2 (using latest revisions).
However it's not playing ball at all.
I've put up two versions both using the same calls to sortable, css,
html files etc,
this.$list.sortable({
    containment:'parent',
    start:this.funcPosStart,
    update:this.funcUpdateSortable,
    stop:this.funcPosStop
});
http://dev.logicbox.net/listsorter15b
http://dev.logicbox.net/listsorter16rc2
Setting tolerance to 'pointer' partially fixes the problem, but is
dependent on where the pointer is placed on the item.
Have I missed some difference between the earlier and later versions?!
Or is this a bug?
Thanks
Will