Java Edition 12w50b

12w50b was released to fix some of the bugs and crashes in the 12w50a snapshot.

Changes

 * Thorns damage is now customizable.
 * Fire Protection now extinguishes players more quickly.
 * Blast Protection now reduces explosion recoil.

Fixes
11 bugs fixed

From released versions before 1.4.6
 * – Mobs walking slow when you hit them
 * – Chest glitch - Server/Client desync
 * – Flaming Arrows Take a Bit to "Flame"
 * – Can't remove xp bars from the "xp-1L" command when you're between level 0 and 1

From the 1.4.6 snapshots
 * – Firework Crafting / unusable ingredients in fireworks are used

From the previous snapshot
 * – Too Highlight shows when itemstack changes
 * –  when nothing in your hand
 * – zombies sometimes stop attacking
 * – Unbreaking does not work on armor
 * – Opening an GUI will show the item name in the hotbar again
 * – Enchanted Item Bug in 3D