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Java Edition 12w41a

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Minecraft 12w41a
12w41a Banner.png

Java Edition



Release date

October 11, 2012

Snapshot for



Client (.json)
Server (.exe)

Protocol version


12w41a is the twelfth snapshot released for Java Edition 1.4.2.[1]



  • Added for repairing, merging & naming items.
    • Three different damage states: Anvil, Slightly Damaged Anvil, and Very Damaged Anvil.
    • Anvils cannot only rename tools and armor, but any item.
      • Renamed placeable items will not retain their name if placed.
    • Anvils can merge enchantments.
      • Items with two different enchantments will give an item with both.
      • Items with the same enchantment will increase the level of the enchantment if they have the same level or take only the highest if they don't.
      • Some enchantments can be lost during the merging because of incompatibility (ex: Sharpness I + Smite I).
        • The first item seems to have the priority (the lost enchantments are on the second item).
    • Anvils can also be dropped in a similar manner to Sand, Gravel, and Dragon Eggs.
      • When landing on a mob, the anvil will deal damage relative to the distance it fell.


  • Now can have custom explosion radius and fuse timer using edited mob spawners and NBT tags (ExplosionRadius & Fuse).



  • Potion-like effects given by the Beacon now use semi-transparent particles, to be less intrusive.
  • Normal potions remain unchanged.


  • No longer forget that they are aggressive against a player in Creative mode after a few seconds anymore.


  • Can now be obtained by breeding animals.
  • Level-up sound now only plays every 5 levels.
    • Sound has been tweaked.


Debug screen
  • Tweaks to debugging
    • F3+H now shows tool and armor durability on damaged items – On maps it shows the zoom level.
    • Now shows which cardinal direction the player is facing on the f value.
    • The pie chart on the F3 overlay is now shown when opening it using shift+F3 instead of vice versa.
Settings menu
  • Renamed "Chat Settings" to "Multiplayer Settings".
    • Contains the old chat settings menu.
    • Option for cape-owners to hide their capes in game.


5 bugs fixed

  • When placing the Anvil in mid-air in a certain orientation the entity will be sideways until it lands.
  • Breaking the block under any Anvil resets it to a regular Anvil.
  • When using the /kill command an error appears, when holding a block it gives the normal message but you don't die.
  • When in a multiplayer server and trying to rename an item, if entire name is erased the client will crash.
  • Using fortune ≥ IV (normally impossible to obtain) on gravel no longer causes a game crash.