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This Minecraft Wiki page is about the bugs and issues in the latest developmental version, currently 12w39b. For the bugs and issues in the current full release version, see Issues.
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Mojang has an official bug tracker and does not track bugs for any editions of Minecraft on this wiki. Please use the appropriate bug tracker to report and view current bug reports.

Java: bugs.mojang.com/browse/MC.
Bedrock: bugs.mojang.com/browse/MCPE.


For further info, see the issues notice page.
Do not delete this page, any issues currently being recorded are purely for archiving purposes.
Issues
Full releases
Pre-releases
Weekly releases

Crashing/system

Bugs

[!!] Created a portal to the end and jumped in crashed game

Speedyrv 9:59am(CST) September 28, 2012

[!!] In 12w39a the game crashed when a minecart was placed and the world wasn't playable after this anymore. In 12w39b these worlds still can't be played on.

--☺ Sven ? ! 15:26, 28 September 2012 (UTC)

[!!] Crashes in the Adventure map Eronev 2 which was built and stable in 12w38b download it here: http://www.minecraftforum.net/topic/1479332-adv Have figured out it has something to do with the mob spawners. When all of them are removed, it loads ok...

(Jigarbov 16:56, 28 September 2012 (UTC))

[!!] I can't create a world. User:ILeon/Sig

  • Me neither, gets stuck on "Generating terrain". After restarting minecraft, world appears in selection screen, but when opening MC crashes again. Log:
--GALAKTOSTalk – Win8RPx64, Java7u7x64, NVIDIA GeForce GTX 560 14:55, 28 September 2012 (UTC)
  • When I fly on an already generated world into new terrain, I get disconnected with an "Internal Server Error"; I'm pretty sure it's the same bug.
(I think the names in square brackets in the stack trace are MCPatcher's deobfuscations, but don't worry, the jar was vanilla) --GALAKTOSTalk – Win8RPx64, Java7u7x64, NVIDIA GeForce GTX 560 15:10, 28 September 2012 (UTC)

Annoyances

Fixed/skipped

Gameplay

Bugs

[!] [SP] While playing skyblock. Water that flows into the void causes major lag --41.133.23.221 17:37, 28 September 2012 (UTC)


[A] "Snapshop 12W39A" While on pig (Riding), travel through portal does not work --Psyscicyclic 18:27, 28 September 2012 (UTC)

Annoyances

Fixed/skipped

Blocks

Bugs

Annoyances

Fixed/skipped

Items

Bugs

Annoyances

Fixed/skipped

World generator

Bugs

In the snapshot 12w39b the nether won't generate for new worlds and the screen will just say generating land and old worlds(with nether already generated) won't load new chunks or update chunks.

Annoyances

Fixed/skipped

Mobs/NPCs/animals

Bugs

Bats can spawn in the mushroom island biome (tested in superflat world with mushroom island as biome)


[!] Cave spiders can move through solid blocks. I have a cave spider water elevator that I sealed off completely and left one airspace at the top. When I am standing on top of it and facing it, the spiders all pile up in the airspace, and all is ok. The moment I turn around, all the spiders are outside and attacking me. In previous versions this was just a visual glitch, but the spiders were still in the airspace, now they have moved through solid blocks. --BeansAndPixels 16:24, 28 September 2012 (UTC)

Annoyances

Fixed/skipped

Graphical/lighting

Bugs

[X] Pistons will not let any light through while closed, they will let some light through when open (as shown in Dinnerbone's twitter screenshot), and they will let full light through while closing, which looks really bad. --GALAKTOSTalk – Win8RPx64, Java7u7x64, NVIDIA GeForce GTX 560 14:57, 28 September 2012 (UTC)

[X] The combination upside-down slab next to normal slab lets light pass.

File:2012-09-27 18.32.24.png

A slab floating in the air half a block above the ground, beside a slab on the ground lets through light.

--GALAKTOSTalk – Win8RPx64, Java7u7x64, NVIDIA GeForce GTX 560 15:06, 28 September 2012 (UTC)

In a Nether has lighting Problem like some glowstone don't do light.

[X] In Minecraft version 12w39A The Ice block's lighting seems to be off as you get a grid of see through lines. It outlines each chunk. Ice Evidence --Sgthotshot09 - Win7SP1x64, Java7u7x64, NVIDIA Quadro 2000m 16:38, 28 September 2012

  • More screenshots --GALAKTOSTalk – Win8RPx64, Java7u7x64, NVIDIA GeForce GTX 560 17:03, 28 September 2012 (UTC)
  • Happens in 12w39b too --GALAKTOSTalk – Win8RPx64, Java7u7x64, NVIDIA GeForce GTX 560 17:04, 28 September 2012 (UTC)
    • This has been happening since like forever and only happens with smooth lightning turned off. --☺ Sven ? ! 18:30, 28 September 2012 (UTC)

Annoyances

Fixed/skipped

Sounds

Bugs

Annoyances

Fixed/skipped

[A] Shooting an arrow into water in 12w39a makes the water sound glitch out.

  • And in this snapshot 12w39b ? --80.134.4.104 15:54, 28 September 2012 (UTC)
  • It's been fixed in the latest snapshot. Jarble 16:23, 28 September 2012 (UTC)

Menus

Bugs

Annoyances

Fixed/skipped

In-game interfaces/HUD

Bugs

Annoyances

Fixed/skipped

Chat/commands

Bugs

Annoyances

Fixed/skipped

Language/text files

Bugs

Annoyances

Fixed/skipped

References

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