---- Minecraft Crash Report ----
// Shall we play a game?

Time: 12/30/12 4:11 PM
Description: Exception ticking world

java.lang.IllegalStateException: Entity is already tracked!
	at ii.a(SourceFile:69)
	at ii.a(SourceFile:52)
	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:52)
	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: Skyblock
	All players: 2 total; [iq['froger599'/176738, l='Skyblock', x=92.85, y=214.17, z=-8.49], iq['sarahsora'/191089, l='Skyblock', x=93.59, y=213.00, z=2.09]]
	Chunk stats: ServerChunkCache: 827 Drop: 0
	Level seed: 6568378731273175102
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-24,64,240), Chunk: (at 8,4,0 in -2,15; contains blocks -32,0,240 to -17,255,255), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 264924 game time, 15666 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 133478 (now: false), thunder time: 46983 (now: true)
	Level game mode: Game mode: survival (ID 0). 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 (amd64) version 6.1
	Java Version: 1.6.0_20, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 421979992 bytes (402 MB) / 769392640 bytes (733 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 1621 (90776 bytes; 0 MB) allocated, 10 (560 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: 3404 (190624 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 2 / 8; [iq['froger599'/176738, l='Skyblock', x=92.85, y=214.17, z=-8.49], iq['sarahsora'/191089, l='Skyblock', x=93.59, y=213.00, z=2.09]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.