---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 12/06/13 22:24
Description: Loading entity NBT

java.lang.UnsupportedOperationException: Cannot modify readonly attribute
	at om.b(SourceFile:59)
	at ti.a(SourceFile:107)
	at ti.a(SourceFile:290)
	at na.f(SourceFile:1061)
	at aax.a(SourceFile:116)
	at aax.h(SourceFile:234)
	at bht.a(SourceFile:22)
	at bht.a(SourceFile:17)
	at bht.a(SourceFile:12)
	at bhy.a(SourceFile:106)
	at bhy.a(SourceFile:98)
	at bei.a(SourceFile:317)
	at beb.a(SourceFile:834)
	at beb.b(SourceFile:682)
	at atc.R(SourceFile:683)
	at atc.d(SourceFile:616)
	at net.minecraft.client.main.Main.main(SourceFile:82)


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

-- Head --
Stacktrace:
	at om.b(SourceFile:59)
	at ti.a(SourceFile:107)
	at ti.a(SourceFile:290)

-- Entity being loaded --
Details:
	Entity Type: Zombie (ti)
	Entity ID: 116
	Entity Name: Zombi
	Entity's Exact location: 0,00, 0,00, 0,00
	Entity's Block 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)
	Entity's Momentum: 0,00, 0,00, 0,00
Stacktrace:
	at na.f(SourceFile:1061)
	at aax.a(SourceFile:116)
	at aax.h(SourceFile:234)
	at bht.a(SourceFile:22)
	at bht.a(SourceFile:17)
	at bht.a(SourceFile:12)

-- Tile Entity Details --
Details:
	Name: MobSpawner // arr
	Block type: ID #52 (tile.mobSpawner // aoq)
	Block data value: 0 / 0x0 / 0b0000
	Block location: World: (-230,4,651), Chunk: (at 10,0,11 in -15,40; contains blocks -240,0,640 to -225,255,655), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
	Actual block type: ID #52 (tile.mobSpawner // aoq)
	Actual block data value: 0 / 0x0 / 0b0000
Stacktrace:
	at bhy.a(SourceFile:106)
	at bhy.a(SourceFile:98)
	at bei.a(SourceFile:317)
	at beb.a(SourceFile:834)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bcf['Lord_Kaydan'/11, l='MpServer', x=-225,71, y=5,62, z=642,90]]
	Chunk stats: MultiplayerChunkCache: 110
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-309,4,644), Chunk: (at 11,0,4 in -20,40; contains blocks -320,0,640 to -305,255,655), Region: (-1,1; contains chunks -32,32 to -1,63, blocks -512,0,512 to -1,255,1023)
	Level time: 35305 game time, 67049 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: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 11 total; [ti['Zombi'/1, l='MpServer', x=-241,34, y=3,00, z=664,26], ti['Zombi'/2, l='MpServer', x=-236,50, y=3,00, z=639,16], ti['Zombi'/3, l='MpServer', x=-236,44, y=4,00, z=653,59], ti['Zombi'/4, l='MpServer', x=-239,16, y=4,00, z=642,97], ti['Zombi'/5, l='MpServer', x=-229,56, y=4,00, z=649,50], ti['Zombi'/6, l='MpServer', x=-229,63, y=4,00, z=650,44], ti['Zombi'/7, l='MpServer', x=-237,03, y=4,00, z=646,47], ti['Zombi'/8, l='MpServer', x=-226,84, y=4,00, z=644,38], ti['Zombi'/9, l='MpServer', x=-237,53, y=5,00, z=652,66], ti['Zombi'/10, l='MpServer', x=-238,13, y=4,00, z=650,31], bcf['Lord_Kaydan'/11, l='MpServer', x=-225,71, y=5,62, z=642,90]]
	Retry entities: 0 total; []
Stacktrace:
	at bcc.a(SourceFile:282)
	at atc.b(SourceFile:1795)
	at atc.d(SourceFile:625)
	at net.minecraft.client.main.Main.main(SourceFile:82)

-- System Details --
Details:
	Minecraft Version: 13w23b
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_07, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 103724960 bytes (98 MB) / 359727104 bytes (343 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 21639 (1211784 bytes; 1 MB) allocated, 2115 (118440 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 13w23b
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6750M GL version 4.1.10428 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 508 (28448 bytes; 0 MB) allocated, 272 (15232 bytes; 0 MB) used