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12w49a Banner.png

Java Edition



Release date

December 7, 2012[1]

Snapshot for



Client (.json)
Server (.exe)

Protocol version


12w49a is the first snapshot released for 1.4.6.



Nether Brick Slabs
  • New kind of slab.
  • Made by using 3 nether brick blocks in a horizontal line.


Enchanted Books
  • Used for enchanting items.
Firework Rocket
  • New kind of shootable projectible.
    • Sound effects will come soon.
  • Fireworks are customizable by crafting
Firework Star



  • When holding sneak, the player can place blocks and items (like redstone, repeaters, and levers) directly onto blocks such as crafting tables, furnaces, and dispensers.


  • The blast radius of fireballs a specific Ghast shoots can be customized with an editor.


16 bugs fixed

From released versions before 1.4.6

  • MC-96 – [1-9] clicking an item out of a furnace does not give XP.
  • MC-256 – Mobs can still revert farmlands to dirt even if mobGriefing gamerule is set on false.
  • MC-498 – Setting an Enderman on fire with flint and steel, or lava, will not make it teleport away.
  • MC-721 – Animals on fire do not flee.
  • MC-1140 – Boats always get placed in the same direction and not based on how they get placed.
  • MC-1240Endermen cannot dodge flame arrow. When the arrow is shot the Enderman moves out of the way but is still set on fire.
  • MC-1311 – When you enter the Nether, the game auto-selects the first item on the toolbar.
  • MC-1847Leaves have the incorrect tool tip.
  • MC-2145 – "Drowning" in creative.
  • MC-2504 – Enchant command cannot enchant with ID 0 (Protection).
  • MC-3332 – You don't hear the xp sound you get every 5 levels.
  • MC-3490Minecarts and falling entities flickering / jittering (updated 1.4.5).
  • MC-3501 – Passsive mob spawn eggs don't consume.
  • MC-3565Endermen don't open their mouth when attacked by other mobs.
  • MC-4069 – Pressing F3+B displays hitboxes.. rendering invisibility potions useless.
  • MC-4117 – wither can sometimes destroy its own star due to the posthumous detonation of wither skulls.