---- Minecraft Crash Report ----
// Oops.

Time: 11.02.13 19:26
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 zo.a(SourceFile:863)
	at iz.a(SourceFile:617)
	at zo.d(SourceFile:855)
	at aaa.a(SourceFile:138)
	at iz.b(SourceFile:118)
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bii.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 (rs)
	Entity ID: 323723
	Entity Name: Skelett
	Entity's Exact location: -258,50, 15,00, 115,50
	Entity's Block location: World: (-259,15,115), Chunk: (at 13,0,3 in -17,7; contains blocks -272,0,112 to -257,255,127), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	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 zo.a(SourceFile:863)
	at iz.a(SourceFile:617)
	at zo.d(SourceFile:855)
	at aaa.a(SourceFile:138)
	at iz.b(SourceFile:118)

-- Affected level --
Details:
	Level name: Rusted from the Rain
	All players: 1 total; [jc['Ralino'/274604, l='Rusted from the Rain', x=-344,69, y=59,00, z=181,30]]
	Chunk stats: ServerChunkCache: 974 Drop: 0
	Level seed: -8714556944347320236
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-56,64,256), Chunk: (at 8,4,0 in -4,16; contains blocks -64,0,256 to -49,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 2419475 game time, 3206173 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 83390 (now: false), thunder time: 46831 (now: false)
	Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:454)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bii.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:567)

-- System Details --
Details:
	Minecraft Version: 13w06a
	Operating System: Windows XP (x86) version 5.1
	Java Version: 1.7.0_13, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 238594936 bytes (227 MB) / 644988928 bytes (615 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 5815 (325640 bytes; 0 MB) allocated, 8 (448 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: 4398 (246288 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [jc['Ralino'/274604, l='Rusted from the Rain', x=-344,69, y=59,00, z=181,30]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.