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{{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://meta.omniarchive.uk/versions/v1/12w30a.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 [[Minecraft:snapshot]] for [[Minecraft:Java Edition 1.3.1]], released on July 23, 2012.<ref>{{citation|url=https://web.archive.org/web/20120726015751/https://www.mojang.com/2012/07/mincraft-snapshot-12w30a/|title=Minecraft Snapshot 12w30b|author=Jens Bergensten|website=Mojang.com|date=July 23, 2012}}</ref>

== Additions ==
=== General ===
'''[[Minecraft:Options]]'''
* Snooper settings
** Allows the player to toggle whether their data are sent to [[Minecraft:Mojang Studios]] for analysis and improvements. Shows which data is sent to Mojang Studios.
* 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 ===
{{Animate|Oak_Stairs_(n)_JE1.png;Spruce_Stairs_(n)_JE1.png;Birch_Stairs_(n)_JE1.png;Jungle_Stairs_(n)_JE1.png;Cobblestone_Stairs_(n)_JE1.png;Stone_Brick_Stairs_(n)_JE1.png;Brick_Stairs_(n)_JE1.png;Sandstone_Stairs_(n)_JE1.png;Nether_Brick_Stairs_(n)_JE1.png|36px}} '''[[Minecraft:Stairs]]'''
* When placed on the upper half of a block's side, stairs are now upside-down. Except of exclusively on the bottom side.

[[File:Lava_JE14.png|36px]] '''[[Minecraft:Lava]]'''
* Now replaces air below y=11.

=== Mobs ===
'''[[Minecraft: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 ===
'''[[Minecraft:The Nether]]'''
* Less laggy.

=== Command format ===
'''{{cmd|/gamemode}}'''
* Invalid numerical game mode IDs are no longer accepted. Previously, specifying an invalid ID would place the target player into Survival mode.

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

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

'''Explosions'''
* [[Minecraft:Creeper]], [[Minecraft:fireball]], and [[Minecraft:TNT]] explosions give off a knockback.

== Fixes ==
'''19 bugs fixed'''
* Fixed existing [[Minecraft:sign]]s not showing text.
* Fixed [[Minecraft: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 [[Minecraft: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 [[Minecraft:compass]]es not pointing to spawn but to X=8 & Z=8 after respawning.
* Fixed other players' [[Minecraft:fishing rod]] lines looking like they start from their feet.
* Fixed a bug with Unbreaking-[[Minecraft:enchanted]] tools and destroying blocks.
* Fixed being able to move LAN [[Minecraft: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 [[Minecraft:minecart]] with the movement keys causing the camera to shake in the direction pressed.
* Fixed [[Minecraft:potion]] effects losing their graphical effects when traveling between dimensions.
* Fixed [[Minecraft:ghast]]'s fireballs getting stuck mid-air when unloading their chunk, might apply to [[Minecraft:fire charge]]s and [[Minecraft:blaze]]'s fireballs as well.
* Fixed the last slot in the opened [[Minecraft: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 ==
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Minecraft:Java Edition 12w30a - Revision history

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