---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.

Time: 2/2/13 8:53 PM
Description: Adding entity to track

java.lang.IllegalStateException: Entity is already tracked!
	at it.a(SourceFile:76)
	at it.a(SourceFile:61)
	at iv.a(SourceFile:24)
	at zk.a(SourceFile:863)
	at iz.a(SourceFile:618)
	at zk.d(SourceFile:855)
	at amc.k(SourceFile:55)
	at amc.a(SourceFile:35)
	at iz.a(SourceFile:425)
	at iz.b(SourceFile:142)
	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: 144 blocks
	Update interval: Once per 20 ticks
	Entity Type: FallingSand (qt)
	Entity ID: 84968
	Entity Name: Falling Block
	Entity's Exact location: -133.50, 36.50, 112.50
	Entity's Block location: World: (-134,36,112), Chunk: (at 10,2,0 in -9,7; contains blocks -144,0,112 to -129,255,127), 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
	Immitating block ID: 13
	Immitating block data: 0
Stacktrace:
	at it.a(SourceFile:76)
	at it.a(SourceFile:61)
	at iv.a(SourceFile:24)
	at zk.a(SourceFile:863)
	at iz.a(SourceFile:618)
	at zk.d(SourceFile:855)
	at amc.k(SourceFile:55)
	at amc.a(SourceFile:35)

-- Block being ticked --
Details:
	Block type: ID #13 (tile.gravel // alz)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (-134,36,112), Chunk: (at 10,2,0 in -9,7; contains blocks -144,0,112 to -129,255,127), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Stacktrace:
	at iz.a(SourceFile:425)
	at iz.b(SourceFile:142)

-- Affected level --
Details:
	Level name: Stranded
	All players: 1 total; [jc['ArrowDude2001'/77585, l='Stranded', x=-87.32, y=79.00, z=246.43]]
	Chunk stats: ServerChunkCache: 625 Drop: 0
	Level seed: -7697539450666798617
	Level generator: ID 02 - largeBiomes, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-92,64,252), Chunk: (at 4,4,12 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: 265 game time, 265 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 37194 (now: false), thunder time: 133739 (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: 1.6.0_20, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 150714144 bytes (143 MB) / 522846208 bytes (498 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 8219 (460264 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 71
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1309 (73304 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 1 / 8; [jc['ArrowDude2001'/77585, l='Stranded', x=-87.32, y=79.00, z=246.43]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.