Java Edition 12w17a

12w17a is the third snapshot released for 1.3.1.

Additions

 * Book and quill & written book
 * Editable Books – Book and quill, crafted using a book, feather, and ink sac
 * When a book and quill is made, it can be right-clicked to open a screen that allows you to type the book.
 * Pressing “Done" will save whatever was typed and allow you to edit the book again later, yet will not “sign" it.
 * When “signing" a book, it will allow you to choose a title up to 16 characters long and disable editing of the book, the Book and Quill then becomes a written book, with the icon changing along with the label
 * Slabs
 * Wooden slabs for each of the four shades of wood added
 * New block IDs 125 for double wooden slabs and 126 for single wooden slabs.
 * These new slabs no longer act like stone
 * An axe should be used to break them
 * They are no longer immune to fire and lava
 * Wooden slabs created in older versions of Minecraft are still stone-like and fireproof and will not change to the new slabs when placed or mined
 * Options
 * Added 'Chat Options'
 * Added chat opacity, letting the chat be semi-transparent
 * Added chat disabling, removing the chat for Multiplayer servers
 * Added chat colors option
 * Added “Only Commands" mode to chat
 * Commands
 * added

Changes

 * Books
 * Leather is now required to craft books
 * Enchantments
 * Silk touch can now retrieve ice and glass panes
 * Ice
 * Ice no longer turns into water in the Nether
 * Creative mode
 * Tools now have infinite durability in Creative mode
 * Minecart and boats can be destroyed in one hit in Creative mode
 * Flying through water in Creative mode is no longer slow
 * Animals
 * Livestock, such as chickens, can now be “walked through" instead of pushing the player around in crowded pens
 * Bonus chest
 * You can no longer have a bonus chest in Hardcore mode
 * Commands
 * Server Commands now appear in italics in SMP
 * Saplings
 * Saplings now have their proper names (e.g. Spruce Sapling)

Fixes
3 bugs fixed


 * Fixed entity collision errors
 * Fixed the pick block function
 * Fixed chat issues