---- Minecraft Crash Report ----
// Ooh. Shiny.

Time: 2/15/13 8:35 PM
Description: Adding entity to track

java.lang.IllegalStateException: Entity is already tracked!
	at ir.a(SourceFile:76)
	at ir.a(SourceFile:55)
	at it.a(SourceFile:24)
	at zq.a(SourceFile:866)
	at ix.a(SourceFile:617)
	at zq.d(SourceFile:858)
	at aac.a(SourceFile:138)
	at ix.b(SourceFile:118)
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bgp.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gn.run(SourceFile:573)


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

-- Entity To Track --
Details:
	Tracking range: 64 blocks
	Update interval: Once per 3 ticks
	Entity Type: Squid (qg)
	Entity ID: 451774
	Entity Name: Squid
	Entity's Exact location: 701.50, 61.00, 719.50
	Entity's Block location: World: (701,61,719), Chunk: (at 13,3,15 in 43,44; contains blocks 688,0,704 to 703,255,719), Region: (1,1; contains chunks 32,32 to 63,63, blocks 512,0,512 to 1023,255,1023)
	Entity's Momentum: 0.00, 0.00, 0.00
Stacktrace:
	at ir.a(SourceFile:76)
	at ir.a(SourceFile:55)
	at it.a(SourceFile:24)
	at zq.a(SourceFile:866)
	at ix.a(SourceFile:617)
	at zq.d(SourceFile:858)
	at aac.a(SourceFile:138)
	at ix.b(SourceFile:118)

-- Affected level --
Details:
	Level name: The Best World
	All players: 2 total; [ja['Hunter_K13'/73, l='The Best World', x=633.26, y=251.00, z=649.12], ja['Banannamana'/888, l='The Best World', x=630.63, y=251.00, z=649.73]]
	Chunk stats: ServerChunkCache: 783 Drop: 0
	Level seed: -976295282
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-128,64,72), Chunk: (at 0,4,8 in -8,4; contains blocks -128,0,64 to -113,255,79), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 3516750 game time, 230165 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 17102 (now: true), thunder time: 156493 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bgp.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gn.run(SourceFile:573)

-- System Details --
Details:
	Minecraft Version: 13w07a
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_13, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 247500712 bytes (236 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 4455 (249480 bytes; 0 MB) allocated, 6 (336 bytes; 0 MB) used
	Suspicious classes: $Proxy3, $Proxy4]
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 4609 (258104 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 2 / 8; [ja['Hunter_K13'/73, l='The Best World', x=633.26, y=251.00, z=649.12], ja['Banannamana'/888, l='The Best World', x=630.63, y=251.00, z=649.73]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.