Java Edition 12w27a

12w27a is the fourteenth snapshot released for 1.3.1.

Additions

 * Commands
 * Starts/stops debug profiling
 * Starts/stops debug profiling

Changes

 * Performance
 * Performance improvements, including reduced CPU, RAM & bandwidth requirements
 * Pistons
 * Updated pistons to make them less error-prone, thus they also appear to update slower, this also altered the way pistons work, so you might have to adapt your repeater delays and similar
 * For this change, pistons now take 2 redstone ticks (4 game ticks) to expand, but they still retract instantly
 * Signs
 * Signs are stackable up to 16
 * Crafting them now gives 3 signs instead of 1 with the same recipe
 * Creative inventory
 * Creative inventory now shows status effects
 * Boats
 * Boats now drop the boat item when destroyed by a player
 * Experience
 * Gaining experience from mining ore is now different for each type of ore (mining coal ore will give you the least amount while diamond ore & emerald ore will give the most amount of XP)
 * Nether wart
 * Nether wart can now grow in the Overworld and the End

Fixes
13 bugs fixed


 * Newly added wooden stairs will now burn.
 * Fixed not working.
 * Fixed powering specific glitched pistons crashing the game.
 * Fixed a visual bug causing pistons to be partially invisible or in the wrong location momentarily.
 * Fixed being able to place portals in the Nether in locations where they would end up in illegal locations in the overworld.
 * Fixed the game crashing when publishing SP worlds with certain language settings.
 * Fixed players on minecarts, boats or pigs and spider jockeys not being displayed in the correct location.
 * Fixed a bug with dispensers.
 * Fixed not accepting some strings form the console, often triggering the help dialogue.
 * Fixed being able to transmute blocks to certain data values using an orientation-dependent tripwire bug.
 * Fixed drinking potions in creative not consuming the potions, but still giving empty bottles.
 * Fixed signs sometimes not saving the text when placing them.
 * Fixed torches at the top of 1x1 vertical shafts not lighting up their own block.