---- Minecraft Crash Report ----
// You should try our sister game, Minceraft!

Time: 1/7/13 9:45 PM
Description: Exception ticking world

java.lang.IllegalStateException: Entity is already tracked!
	at ii.a(SourceFile:69)
	at ii.a(SourceFile:50)
	at ij.a(SourceFile:24)
	at yc.a(SourceFile:842)
	at in.a(SourceFile:580)
	at yc.d(SourceFile:834)
	at yp.a(SourceFile:138)
	at in.b(SourceFile:113)
	at net.minecraft.server.MinecraftServer.r(SourceFile:736)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(SourceFile:117)
	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:50)
	at ij.a(SourceFile:24)
	at yc.a(SourceFile:842)
	at in.a(SourceFile:580)
	at yc.d(SourceFile:834)
	at yp.a(SourceFile:138)
	at in.b(SourceFile:113)

-- Affected level --
Details:
	Level name: felix
	All players: 1 total; [iq['felix0211'/48, l='felix', x=-93.06, y=468.09, z=256.56]]
	Chunk stats: ServerChunkCache: 457 Drop: 0
	Level seed: -5289042360857279527
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-96,64,252), Chunk: (at 0,4,12 in -6,15; contains blocks -96,0,240 to -81,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 10449 game time, 10449 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 167849 (now: false), thunder time: 94644 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:736)
	at net.minecraft.server.MinecraftServer.q(SourceFile:679)
	at bdz.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:613)
	at fy.run(SourceFile:849)

-- System Details --
Details:
	Minecraft Version: 1.4.6
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 198897664 bytes (189 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 2405 (134680 bytes; 0 MB) allocated, 4 (224 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 4506 (252336 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [iq['felix0211'/48, l='felix', x=-93.06, y=468.09, z=256.56]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.