---- Minecraft Crash Report ----
// Don't be sad. I'll do better next time, I promise!

Time: 21-3-13 23:21
Description: Ticking entity

java.lang.NullPointerException
	at net.minecraft.server.MinecraftServer.a(SourceFile:591)
	at mp.c(SourceFile:1514)
	at rh.c(SourceFile:212)
	at mp.x(SourceFile:314)
	at mp.l_(SourceFile:277)
	at rh.l_(SourceFile:64)
	at aab.a(SourceFile:1336)
	at iz.a(SourceFile:508)
	at aab.g(SourceFile:1314)
	at aab.h(SourceFile:1221)
	at iz.h(SourceFile:390)
	at net.minecraft.server.MinecraftServer.r(SourceFile:462)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bjh.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:573)


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

-- Head --
Stacktrace:
	at net.minecraft.server.MinecraftServer.a(SourceFile:591)
	at mp.c(SourceFile:1514)
	at rh.c(SourceFile:212)
	at mp.x(SourceFile:314)
	at mp.l_(SourceFile:277)
	at rh.l_(SourceFile:64)
	at aab.a(SourceFile:1336)
	at iz.a(SourceFile:508)
	at aab.g(SourceFile:1314)

-- Entity being ticked --
Details:
	Entity Type: Item (rh)
	Entity ID: 53149
	Entity Name: item.tile.dirt
	Entity's Exact location: 239,17, 87,88, 17,04
	Entity's Block location: World: (239,87,17), Chunk: (at 15,5,1 in 14,1; contains blocks 224,0,16 to 239,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Entity's Momentum: 0,17, 0,16, 0,04
Stacktrace:
	at aab.h(SourceFile:1221)
	at iz.h(SourceFile:390)

-- Affected level --
Details:
	Level name: world
	All players: 1 total; [jc['Raaoull'/252, l='world', x=239,00, y=86,23, z=17,00]]
	Chunk stats: ServerChunkCache: 448 Drop: 0
	Level seed: 786001812926987586
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,0,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 0 game time, 0 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: ~~ERROR~~ NullPointerException: null
Stacktrace:
	at net.minecraft.server.MinecraftServer.r(SourceFile:462)
	at net.minecraft.server.MinecraftServer.q(SourceFile:397)
	at bjh.q(SourceFile:122)
	at net.minecraft.server.MinecraftServer.run(SourceFile:331)
	at gp.run(SourceFile:573)

-- System Details --
Details:
	Minecraft Version: 1.5.1
	Operating System: Mac OS X (i386) version 10.7.5
	Java Version: 1.6.0_43, Apple Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Apple Inc.
	Memory: 443026208 bytes (422 MB) / 580517888 bytes (553 MB) up to 1067057152 bytes (1017 MB)
	JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
	AABB Pool Size: 4564 (255584 bytes; 0 MB) allocated, 2988 (167328 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: 2013 (112728 bytes; 0 MB) allocated, 176 (9856 bytes; 0 MB) used
	Player Count: 1 / 8; [jc['Raaoull'/252, l='world', x=239,00, y=86,23, z=17,00]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.