{{Infobox version
|title=Minecraft 12w17a
|image=12w17a Banner.png
|image2=Java Edition 12w17a.png
|edition=java
|type=Snapshot
|parent=1.3.1
|date=April 26, 2012
|clientdl=[https://vault.omniarchive.uk/archive/java/client-release/1.3/pre/12w17a.jar Client] ([https://archive.org/download/Minecraft-JSONs/12w17a.json .json])
|serverdl=[https://vault.omniarchive.uk/archive/java/server-release/1.3/pre/12w17a-1424.jar Server]
|exedl=[https://vault.omniarchive.uk/archive/java/server-release/1.3/pre/12w17a-1424.exe .exe]
[[Category:Versions using legacy download site]]
|prevparent=1.2.5
|prev=12w16a
|next=12w18a
|nextparent=1.3.2
}}<onlyinclude>
'''12w17a''' is the third [[snapshot]] for [[Java Edition 1.3.1]], released on April 26, 2012.<ref>{{citation|url=https://web.archive.org/web/20120427014334/https://www.mojang.com/2012/04/minecraft-snapshot-12w17a/|title=Minecraft Snapshot 12w17a|author=Jens Bergensten|website=Mojang.com|date=April 26, 2012}}</ref>

== Additions ==
=== Blocks ===
; [[Wooden slab]]s
* Slabs for each of the four types of wood added.
** New block IDs <code>125</code> for double wooden slabs and <code>126</code> 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 don't change to the new slabs when placed or mined.

=== Items ===
; [[Book and quill]]s
* Editable books, 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 player to type in the book.
** Pressing "Done" saves whatever was typed and allows player to edit the book again later, yet does not "sign" it.
** When "signing" a book, it allows player 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.

; [[Written book]]
* Looks the same as a regular book, but has a shine like an enchantment.
* After being finished, the written book cannot be edited again.

=== Commands ===
; General
* {{cmd|help}} and alias {{cmd|?}} added.

=== General ===
; [[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.

== Changes ==
=== Blocks ===
; [[Ice]]
* Ice no longer turns into [[water]] in [[the Nether]].

; [[Sapling]]s
* Now have their proper names (e.g. "Spruce Sapling").

=== Items ===
; [[Book]]s
* Now require [[leather]] to craft.

; [[Tool]]s
* Now have infinite [[durability]] in Creative mode.

=== Mobs ===
; [[Animal]]s
* Livestock, such as [[chicken]]s, can now be "walked through" instead of pushing the player around in crowded pens.

=== Non-mob entities ===
; [[Boat]]s and [[minecart]]s
* Can now be destroyed in one hit in Creative mode.

=== Gameplay ===
; [[Bonus chest]]
* The player can no longer have a bonus chest in Hardcore mode.

; [[Creative mode]]
* Flying through water in Creative mode is no longer slow.

; [[Enchantment]]s
* [[Silk Touch]] can now retrieve [[ice]] and [[glass pane]]s.

=== Command format ===
; General
* Server commands now appear in ''italics'' in multiplayer.

== Fixes ==
; 3 bugs fixed
* Fixed entity collision errors.
* Fixed the pick block function.
* Fixed chat issues.</onlyinclude>

== References ==
{{reflist}}

== Navigation ==
{{Navbox Java Edition versions|1.0}}

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