Java Edition 12w17a

12w17a is the third snapshot released for 1.3.1.

Additions

 * 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.
 * Wooden slabs for each of the four shades of wood added
 * 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
 * In the menu, Chat Options were added.
 * Added chat opacity, letting the chat be semi-transparent.
 * Added chat disabling, removing the chat for SMP servers.
 * Added chat colors option.
 * Added "Only Commands" mode to chat.
 * added.

Changes

 * New block IDs 125 for double wooden slabs and 126 for single wooden slabs.
 * 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.
 * Leather is now required to craft Books.
 * Silk touch can now retrieve Ice blocks and glass panes.
 * Ice no longer turns into water in the Nether.
 * Tools now have infinite durability in Creative mode.
 * Minecart and boats are destroyed in one hit in Creative mode.
 * Livestock, such as chickens, can now be "walked through" instead of pushing the player around in crowded pens
 * Flying through water in Creative mode is no longer slow
 * You can no longer have a bonus chest in Hardcore mode.
 * Server Commands now appear in italics in SMP.
 * Saplings now have their proper names.

Fixes
3 bugs fixed


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