Changes in Sortables from 1.5rc1 to 1.5?

Changes in Sortables from 1.5rc1 to 1.5?


Curious... what changed between the release candidate and 1.5 for
sortables? I went to upgrade tonight and experienced a whole host of
trouble. Looks like things broke down in two places, first I had an
update callback that referenced ui.instance.helper and that seems to
no longer work, second is that my particular sortable node used to be
able to be clicked on causing a different interaction, but not
clicking trips the sortable, despite the fact that there is no
dragging action.
Anyhow... what changed and what was the rationale?
Thanks,
- Stan