Java Edition 13w39b

13w39b was released to fix some of the bugs with 13w39a.

Changes

 * An alert appears telling you to use item names when you spawn an item in using its ID, as they will soon become deprecated
 * A different alert in the main menu warns you of a change in the far future, which will result in Minecraft requiring at least the OpenGL 2.1 feature set
 * The "Diamonds to you" achievement can be obtained by throwing a diamond at a zombie with the "CanPickUpLoot" NBT-tag
 * Minecart with Command Block only activates every 4 ticks (2 redstone ticks) when on a powered Activator Rail
 * Changed the item name (the name used in place of block and item IDs in the /give command) of the Minecart with Command Block from "minecraft:hopper_command_block" to "minecraft:command_block_minecart"

Fixes

 * Fixed 7 bugs


 * From the 1.7.2 snapshots
 * – "Diamonds to you" Achievement not available in Singleplayer
 * – Super Secret settings does nothing / Shaders don't work


 * From the previous snapshot
 * – Some shaders render entire screen black
 * – Activating Minecart with Command Block with an Activator Rail causes multiple activations
 * – Squid damage multiplayer - End of Stream, NullPointerException
 * – Command Blocks ignore Gamerule "commandBlockOutput"
 * – command no longer works