jquery/jquery-ui — pull request #1131 by zawaideh (2013-11-08 20:22:33+00:00)
Title: sortable: in _mouseStart move refreshPositions call after the callbacks 

to allow the callbacks to make height changes.

Reasoning:

I have a start callback in one of my sortables that changes the height of a connected sortable. Dragging to the connected doesn't have an effect since the cached heights of the elements are wrong. This pull request fixes it.