---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 2/2/13 10:28 AM
Description: Adding entity to track

java.lang.IllegalStateException: Entity is already tracked!
	at it.a(SourceFile:76)
	at it.a(SourceFile:58)
	at iv.a(SourceFile:24)
	at zk.a(SourceFile:863)
	at iz.a(SourceFile:618)
	at zk.d(SourceFile:855)
	at zw.a(SourceFile:138)
	at iz.b(SourceFile:119)
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bid.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:567)


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

-- Entity To Track --
Details:
	Tracking range: 80 blocks
	Update interval: Once per 3 ticks
	Entity Type: Skeleton (rq)
	Entity ID: 1205711
	Entity Name: Skeleton
	Entity's Exact location: -280.50, 27.00, -43.50
	Entity's Block location: World: (-281,27,-44), Chunk: (at 7,1,4 in -18,-3; contains blocks -288,0,-48 to -273,255,-33), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Entity's Momentum: 0.00, 0.00, 0.00
Stacktrace:
	at it.a(SourceFile:76)
	at it.a(SourceFile:58)
	at iv.a(SourceFile:24)
	at zk.a(SourceFile:863)
	at iz.a(SourceFile:618)
	at zk.d(SourceFile:855)
	at zw.a(SourceFile:138)
	at iz.b(SourceFile:119)

-- Affected level --
Details:
	Level name: New World
	All players: 1 total; [jc['Slackertron'/1182170, l='New World', x=-338.90, y=64.00, z=64.84]]
	Chunk stats: ServerChunkCache: 614 Drop: 0
	Level seed: 2313908384772080558
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-176,64,84), Chunk: (at 0,4,4 in -11,5; contains blocks -176,0,80 to -161,255,95), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 5655 game time, 5655 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 34924 (now: false), thunder time: 153522 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: true. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bid.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:567)

-- System Details --
Details:
	Minecraft Version: 13w05b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 62448528 bytes (59 MB) / 467402752 bytes (445 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 4888 (273728 bytes; 0 MB) allocated, 6 (336 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1168 (65408 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [jc['Slackertron'/1182170, l='New World', x=-338.90, y=64.00, z=64.84]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.