---- Minecraft Crash Report ----
// This is a token for 1 free hug. Redeem at your nearest Mojangsta: [~~HUG~~]

Time: 11/16/12 2:25 PM
Description: Exception ticking world

java.util.ConcurrentModificationException
	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
	at java.util.HashMap$KeyIterator.next(Unknown Source)
	at im.b(SourceFile:196)
	at in.b(SourceFile:116)
	at net.minecraft.server.MinecraftServer.r(SourceFile:743)
	at net.minecraft.server.MinecraftServer.q(SourceFile:686)
	at bdo.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:620)
	at fy.run(SourceFile:856)


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

-- Head --
Stacktrace:
	at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
	at java.util.HashMap$KeyIterator.next(Unknown Source)
	at im.b(SourceFile:196)
	at in.b(SourceFile:116)

-- Affected level --
Details:
	Level name: Flat
	All players: 0 total; []
	Chunk stats: ServerChunkCache: 1066 Drop: 441
	Level seed: -6430002300071715511
	Level generator: ID 01 - flat, ver 0. Features enabled: true
	Level generator options: 
	Level spawn location: World: (-1164,4,-2015), Chunk: (at 4,0,1 in -73,-126; contains blocks -1168,0,-2016 to -1153,255,-2001), Region: (-3,-4; contains chunks -96,-128 to -65,-97, blocks -1536,0,-2048 to -1025,255,-1537)
	Level time: 9056 game time, 9056 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 155108 (now: false), thunder time: 31340 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:743)
	at net.minecraft.server.MinecraftServer.q(SourceFile:686)
	at bdo.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:620)
	at fy.run(SourceFile:856)

-- System Details --
Details:
	Minecraft Version: 1.4.4
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_06-ea, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 338048024 bytes (322 MB) / 512229376 bytes (488 MB) up to 512229376 bytes (488 MB)
	JVM Flags: 2 total; -Xms512m -Xmx512m
	AABB Pool Size: 3897 (218232 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 405 (22680 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Player Count: 0 / 8; []
	Type: Integrated Server (map_client.txt)
	Is Modded: Very likely; Jar signature invalidated