Shift + Double Click No Longer Working

A feature introduced in snapshot 13w01a/b was the ability to "Shift double click an item stack to move all other item stacks of that kind to that part of the inventory." However, in 13w02a/b this no longer works.

Steps to reproduce:
1. Have multiple items of the same kind scattered around in inventory (not in full stacks)
2. Open a chest
3. Attempt the click + button combination