{{Infobox version
|title=Minecraft 12w30a
|image=Java Edition 12w30a.png
|edition=java
|type=Snapshot
|parent=1.3.1
|date=July 23, 2012
|clientdl=[https://vault.omniarchive.uk/archive/java/client-release/1.3/pre/12w30a.jar Client] ([https://archive.org/download/Minecraft-JSONs/12w30a.json .json])
|serverdl=[https://vault.omniarchive.uk/archive/java/server-release/1.3/pre/12w30a.jar Server]
|exedl=[https://vault.omniarchive.uk/archive/java/server-release/1.3/pre/12w30a.exe .exe]
[[Category:Versions using legacy download site]]
|prevparent=1.2.5
|prev=12w27a
|next=12w30b
|nextparent=1.3.2
}}<onlyinclude>

'''12w30a''' is the fifteenth [[snapshot]] for [[Java Edition 1.3.1]], released on July 23, 2012.<ref>https://web.archive.org/web/20120726015751/https://www.mojang.com/2012/07/mincraft-snapshot-12w30a/</ref>

== Additions ==
=== General ===
; [[Options]]
* Snooper settings
** Allows the player to toggle whether their data are sent to [[Mojang]] for analysis and improvements. Shows which data is sent to Mojang.
* Added "Vertical Synchronization" in video settings.
** Has to be toggled manually in <code>options.txt</code>.
* Fullscreen mode setting is now persistent.
** Has to be toggled manually in <code>options.txt</code>.

== Changes ==
=== Blocks ===
; [[Stairs]]
* When placed on the upper half of a block's side, stairs are now upside-down.

=== Mobs ===
; [[Explosion]]s
* Depending on difficulty, explosion damage is now scaled.
** Peaceful: no damage.
** Easy: ~50% less damage.
** Normal: same damage as before.
** Hard: ~33% more damage than before.
** "In full diamond armor + hard difficulty a creeper can knock you down to 2 hearts."<ref>{{tweet|dinnerbone|227339500941082626}}</ref>

=== World generation ===
; [[The Nether]]
* Less laggy.

=== Command format ===
; {{cmd|/gamemode 3}}
* Survival mode's command is now {{cmd|/gamemode 0}}.

=== General ===
; [[Debug screen]]
* In {{key|F3}} mode, the ''y'' coordinate now shows both the feet level and the eye level.

; Performance
* Accelerated [[chunk]] loading.
* Decreased lag spike frequency.
* Made chat work smoothly even when the [[server]] is lagging.
* Decreased unnecessary world updates.
* Decreased packets sent between client and server.

; Explosions
* [[Creeper]], [[fireball]], and [[TNT]] explosions give off a knockback.

== Fixes ==
; 19 bugs fixed
* Fixed existing [[sign]]s not showing text.
* Fixed [[monster spawner]]s all looking like pig spawners.
* Fixed {{key|Cmd}} + {{key|C}}, {{key|Cmd}} + {{key|x}} and {{key|Cmd}} + {{key|V}} not working on Mac OS X.
* Fixed sneaking players' nameplates not staying hidden when loading the chunks the sneaking players are in.
* Fixed multiple [[chunk]]s often not displaying.
* Fixed higher server-set view distances instantly kicking joining players.
* Fixed sections above Y=191 becoming invisible when loading worlds.
* Fixed not completely generated chunks not updating visually until walking into them.
* Fixed [[compass]]es not pointing to spawn but to X=8 & Z=8 after respawning.
* Fixed other players' [[fishing rod]] lines looking like they start from their feet.
* Fixed a bug with Unbreaking-[[enchanted]] tools and destroying blocks.
* Fixed being able to move LAN [[server]]s in the server list and crashing the game.
* Fixed opening SP worlds to LAN, saving and quitting it leaving the server running and showing up in the server list.
* Fixed pushing a [[minecart]] with the movement keys causing the camera to shake in the direction pressed.
* Fixed [[potion]] effects losing their graphical effects when traveling between dimensions.
* Fixed [[ghast]]'s fireballs getting stuck mid-air when unloading their chunk, might apply to [[fire charge]]s and [[blaze]]'s fireballs as well.
* Fixed the last slot in the opened [[Creative inventory]]'s hotbar being one pixel too short on all but the Survival inventory tabs, and a few pixels being off on the Survival inventory tab.
* Fixed blocks disappearing when player is placing them under themselves and jumps.<ref>{{tweet|dinnerbone|226702479449026560}}</ref>
* Fixed the client trying to trample crops instead of letting the server dictate trampling.</onlyinclude>

== References ==
{{reflist}}

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

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