---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 24.01.14 12:21
Description: Exception getting block type in world

java.lang.RuntimeException: Already decorating
	at ail.a(SourceFile:21)
	at aif.a(SourceFile:386)
	at asc.a(SourceFile:443)
	at nl.a(SourceFile:174)
	at aqz.a(SourceFile:838)
	at nl.c(SourceFile:103)
	at nl.d(SourceFile:116)
	at ahn.b(SourceFile:273)
	at ahn.f(SourceFile:268)
	at ahn.c(SourceFile:204)
	at ahn.d(SourceFile:219)
	at aso.a(SourceFile:28)
	at ail.a(SourceFile:141)
	at ail.a(SourceFile:27)
	at aif.a(SourceFile:386)
	at asc.a(SourceFile:443)
	at nl.a(SourceFile:174)
	at aqz.a(SourceFile:846)
	at nl.c(SourceFile:103)
	at net.minecraft.server.MinecraftServer.h(SourceFile:257)
	at byn.a(SourceFile:89)
	at byn.f(SourceFile:105)
	at net.minecraft.server.MinecraftServer.run(SourceFile:347)
	at mc.run(SourceFile:647)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at ail.a(SourceFile:21)
	at aif.a(SourceFile:386)
	at asc.a(SourceFile:443)
	at nl.a(SourceFile:174)
	at aqz.a(SourceFile:838)
	at nl.c(SourceFile:103)
	at nl.d(SourceFile:116)
	at ahn.b(SourceFile:273)
	at ahn.f(SourceFile:268)

-- Requested block coordinates --
Details:
	Found chunk: true
	Location: World: (0,2,-3), Chunk: (at 0,0,13 in 0,-1; contains blocks 0,0,-16 to 15,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Stacktrace:
	at ahn.c(SourceFile:204)
	at ahn.d(SourceFile:219)
	at aso.a(SourceFile:28)
	at ail.a(SourceFile:141)
	at ail.a(SourceFile:27)
	at aif.a(SourceFile:386)
	at asc.a(SourceFile:443)
	at nl.a(SourceFile:174)
	at aqz.a(SourceFile:846)
	at nl.c(SourceFile:103)
	at net.minecraft.server.MinecraftServer.h(SourceFile:257)
	at byn.a(SourceFile:89)
	at byn.f(SourceFile:105)
	at net.minecraft.server.MinecraftServer.run(SourceFile:347)
	at mc.run(SourceFile:647)

-- System Details --
Details:
	Minecraft Version: 14w04a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_51, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 473320144 bytes (451 MB) / 553648128 bytes (528 MB) up to 3817865216 bytes (3641 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx4G
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 103
	Profiler Position: N/A (disabled)
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.