User blog:David Dooda/Snapshot 12w36a is out!

New Feature

 * Improved Superflat world generation


 * You can now select the height and material superflat worlds are made of
 * Screenshots
 * You can select which layer is how high and consists of which material
 * So far, no GUI is available - You can edit the level.dat file, as mentioned here - Example in this video
 * Added Wither Boss painting - via
 * Skeletons now spawn in the Nether
 * Added "Nether Star" Item


 * Drops when killing a Wither
 * Used to craft the Beacon block
 * Glows like an enchanted item
 * Screenshot
 * Added a new mob variant in the Nether


 * "Wither Skeletons"
 * Screenshot
 * Carry and rarely drop Stone swords when killed by players
 * Drop bones and coal
 * Give players "Wither" effect when hitting them - via
 * Improved the Wither


 * Is summoned by arranging a few mob heads in a certain way
 * Place 4 pieces of soulsand in a T-shape and place 3 Wither Skeleton Skulls on top to create it
 * Drops a Nether Star on death
 * Give players "Wither II" effect when hitting them
 * After spawning, it flashes blue, builds up health, grows slightly and is invincible for a few seconds
 * Constantly regenerates health
 * Retextured Wither Armor
 * Screenshots
 * Darkens the sky when spawned in the Overworld
 * Improved the Beacon block


 * Is now officially called "Beacon"
 * Can now be crafted by surrounding a Nether Star with 5 blocks of glass on top of 3 blocks of obsidian - Screenshot - via
 * Screenshots - partially via
 * Improved Breeding


 * Chickens now use seeds instead of wheat to breed
 * Pigs now use carrots instead of wheat to breed
 * Zombies that pick up items now always drop them
 * Added decorative mob head blocks


 * Screenshot
 * Are a very rare mob drop
 * Can be worn - Screenshot - via
 * Can be put on the ground in 16 orientations and hung on walls - Screenshot
 * Carrots and potatoes can now be found in villages


 * Screenshots
 * Improved pigs


 * Now accelerate to up to 5 m/s
 * Saddled pigs can be controlled now
 * Saddled pigs now drop their saddle when dying
 * Screenshot
 * Pigs don't jump or move in water when following a carrot on a stick held by its ride, via - via
 * Added a way of controlling pigs


 * You either put a potato or a carrot on a stick to control it - It is a carrot
 * Screenshot
 * Craft a fishing rod with a carrot to get a carrot on a stick
 * When held, it dictates the direction pigs you are riding will head to
 * Nearby pigs flock towards the player if he is holding the carrot on a stick
 * Improved mob spawners


 * You can now get 15 levels of experience per 15 minutes of grinding
 * Disregard that, spawners act normal again
 * Improved Dyeing


 * Leather armor now uses two overlayed textures, one being the color
 * Minor changes to the leather dyeing - the colors will attempt to maintain intensity and not dilute as much
 * Fixed some bugs


 * Fixed the game crashing when extending maps

Source: www.reddit.com/r/Minecraft/comments/zg22l/minecraft_snapshot_12w36a/
(Warning: Innapropriate reference at the top of the list of updates.)