---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 26.02.13 22:18
Description: Ticking entity

java.lang.IllegalStateException: Entity is already tracked!
	at ii.a(SourceFile:69)
	at ii.a(SourceFile:47)
	at ij.a(SourceFile:24)
	at yc.a(SourceFile:842)
	at in.a(SourceFile:580)
	at yc.d(SourceFile:834)
	at gm.a(SourceFile:370)
	at lq.b(SourceFile:1493)
	at px.b(SourceFile:212)
	at amn.a(SourceFile:62)
	at lq.D(SourceFile:653)
	at lq.d(SourceFile:616)
	at px.j_(SourceFile:72)
	at yc.a(SourceFile:1319)
	at in.a(SourceFile:450)
	at yc.g(SourceFile:1297)
	at yc.h(SourceFile:1196)
	at in.h(SourceFile:362)
	at net.minecraft.server.MinecraftServer.r(SourceFile:744)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(IntegratedServer.java:170)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)


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

-- Head --
Stacktrace:
	at ii.a(SourceFile:69)
	at ii.a(SourceFile:47)
	at ij.a(SourceFile:24)
	at yc.a(SourceFile:842)
	at in.a(SourceFile:580)
	at yc.d(SourceFile:834)
	at gm.a(SourceFile:370)
	at lq.b(SourceFile:1493)
	at px.b(SourceFile:212)
	at amn.a(SourceFile:62)
	at lq.D(SourceFile:653)
	at lq.d(SourceFile:616)
	at px.j_(SourceFile:72)
	at yc.a(SourceFile:1319)
	at in.a(SourceFile:450)
	at yc.g(SourceFile:1297)

-- Entity being ticked --
Details:
	Entity Type: Item (px)
	Entity ID: 1730
	Name: item.tile.dirt
	Exact location: 100,00, 50,13, 0,00
	Block location: World: (100,50,0), Chunk: (at 4,3,0 in 6,0; contains blocks 96,0,0 to 111,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Momentum: 0,00, 0,00, 0,00
Stacktrace:
	at yc.h(SourceFile:1196)
	at in.h(SourceFile:362)

-- Affected level --
Details:
	Level name: Meiks Chunk
	All players: 1 total; [iq['touristenfahrer'/203, l='Meiks Chunk', x=100,00, y=49,00, z=0,00]]
	Chunk stats: ServerChunkCache: 445 Drop: 0
	Level seed: -7593211611580046436
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 0 game time, 0 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:744)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(IntegratedServer.java:170)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)

-- System Details --
Details:
	Minecraft Version: 1.4.7
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_15, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 5387238704 bytes (5137 MB) / 5659557888 bytes (5397 MB) up to 5659557888 bytes (5397 MB)
	JVM Flags: 2 total; -Xms5632m -Xmx5632m
	AABB Pool Size: 2025 (113400 bytes; 0 MB) allocated, 1559 (87304 bytes; 0 MB) used
	Suspicious classes: IWrUpdater, Config, WrUpdaterThreaded, ...]
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 2070 (115920 bytes; 0 MB) allocated, 1809 (101304 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['touristenfahrer'/203, l='Meiks Chunk', x=100,00, y=49,00, z=0,00]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Very likely; Jar signature invalidated