Minecraft: Two new Weekly Snapshots!

The new weekly snapshot is finally released, and we got 2 this week!
Here's the changelog:

12w41a

• Added a new Anvil Block for repairing, merging & naming items
  • Three different damage states: Anvil, Slightly Damaged Anvil, and Very Damaged Anvil.
  • Anvils can not only rename tools and armor, but any item.
    • Renamed placeable items will not retain their name if placed.
  • Anvils can merge enchantments! The system is complex
    • 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.
• Renamed Chat Settings to Multiplayer Settings
  • Contains the old chat settings menu
  • Option for cape-owners to hide their capes ingame
• 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
• Mobs no longer forget that they are aggressive against a player in Creative mode after a few seconds anymore
• Creepers now can have custom explosion radius and fuse timer using edited mob spawners and NBT tags (ExplosionRadius & Fuse)^{reference needed}
• Effects given by the Beacon will be less intrusive on the screen
• Level-up sound now only plays every 5 levels and has been tweaked.
• Gaining experience from breeding animals.
• More tweaks!

12w41b

Anvils will be damaged by falling depending on distance fallen.