The snapshot to fix the shift-click crafting bug .
Code:
Minecraft Snapshot 12w05b
by Jens Bergensten on February 3, 2012
We decided to do an extra update of the snapshot this week. The reason was because of the shift-click bug when crafting items, which would consume all the items in the crafting table and only produce a single result item. This bug is troublesome because it’s such a fundamental feature, and we don’t want to penalize people if they forget that it’s broken.
We also fixed so that cats can be told to sit with an empty hand.