13w23b is the twelfth snapshot for 1.6.1, and was released to fix some of the bugs and crashes in the 13w23a snapshot.
Additions
Items
- Now give the new Health Boost effect.
Gameplay
- Added Health Boost effect.
- Also, both the attribute and the potion effect now show the hearts.
Changes
Items
- Normal golden apples now give Regeneration II for 10 seconds.
Mobs
- New mechanics and AI.
- Able to lock onto the player from much further away.
- Mobbing zombies can now move when further than 32 blocks from player.
- Spawn additional zombies when not being looked at.
Fixes
From the 1.6.1 snapshots
- 17222 – ALL spawners with ActiveEffects crash the game, breaking hundreds of custom maps and servers.
From the previous snapshot
- 17403 – Golden apples only heal one heart compared to two in version 1.5.2.