crash when playing herobrines mansion

---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 03/01/13 17:57
Description: Rendering screen

java.lang.IndexOutOfBoundsException: Index: 9, Size: 8
	at java.util.ArrayList.rangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at awa.a(SourceFile:100)
	at avf.a(SourceFile:63)
	at awa.a(SourceFile:114)
	at ban.b(SourceFile:774)
	at net.minecraft.client.Minecraft.J(SourceFile:605)
	at net.minecraft.client.Minecraft.run(SourceFile:534)
	at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
	at java.util.ArrayList.rangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at awa.a(SourceFile:100)
	at avf.a(SourceFile:63)
	at awa.a(SourceFile:114)

-- Screen render details --
Details:
	Screen name: awa
	Mouse location: Scaled: (276, 72). Absolute: (553, 335)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [ays['riz0671'/5031, l='MpServer', x=-103.83, y=56.62, z=174.91]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-118,46,-25), Chunk: (at 10,2,7 in -8,-2; contains blocks -128,0,-32 to -113,255,-17), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
	Level time: 6003719 game time, 16935 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
	Level game mode: Game mode: adventure (ID 2). Hardcore: false. Cheats: false
	Forced entities: 42 total; [ays['riz0671'/5031, l='MpServer', x=-239.79, y=-267.65, z=259.71], pb['Mooshroom'/628197, l='MpServer', x=-159.25, y=58.00, z=191.41], pb['Mooshroom'/628198, l='MpServer', x=-167.53, y=61.00, z=198.66], pb['Mooshroom'/709711, l='MpServer', x=-81.50, y=55.00, z=130.63], ays['riz0671'/5031, l='MpServer', x=-250.70, y=28.62, z=321.49], ays['riz0671'/5031, l='MpServer', x=-250.70, y=28.62, z=321.49], qu['Villager'/709713, l='MpServer', x=-102.56, y=55.00, z=174.78], ays['riz0671'/5031, l='MpServer', x=-103.83, y=56.62, z=174.91], ow['Bat'/768274, l='MpServer', x=-75.52, y=50.00, z=233.48], ow['Bat'/768275, l='MpServer', x=-72.84, y=50.00, z=229.59], ow['Bat'/768276, l='MpServer', x=-78.50, y=50.00, z=232.48], ays['riz0671'/5031, l='MpServer', x=-219.22, y=-261.82, z=268.51], ow['Bat'/768281, l='MpServer', x=-77.59, y=50.00, z=233.50], ays['riz0671'/5031, l='MpServer', x=-237.03, y=-268.20, z=258.13], ays['riz0671'/5031, l='MpServer', x=-244.86, y=29.12, z=339.70], ays['riz0671'/5031, l='MpServer', x=-250.70, y=28.62, z=321.49], ays['riz0671'/5031, l='MpServer', x=-260.14, y=29.12, z=322.30], ays['riz0671'/5031, l='MpServer', x=-244.86, y=29.12, z=325.12], qu['Villager'/5022, l='MpServer', x=-102.38, y=55.00, z=177.75], pb['Mooshroom'/5017, l='MpServer', x=-126.50, y=82.00, z=94.50], qr['Zombie'/709842, l='MpServer', x=-163.97, y=54.00, z=153.53], pb['Mooshroom'/709843, l='MpServer', x=-134.63, y=54.00, z=107.75], qr['Zombie'/709841, l='MpServer', x=-168.50, y=54.00, z=147.31], pb['Mooshroom'/709846, l='MpServer', x=-87.31, y=60.00, z=124.47], pb['Mooshroom'/709847, l='MpServer', x=-49.81, y=81.00, z=102.94], pb['Mooshroom'/709844, l='MpServer', x=-119.53, y=64.00, z=106.47], pb['Mooshroom'/709845, l='MpServer', x=-114.50, y=81.00, z=97.50], pb['Mooshroom'/709852, l='MpServer', x=-45.25, y=79.00, z=107.50], qk['Zombie Pigman'/709853, l='MpServer', x=-37.31, y=54.00, z=250.25], ays['riz0671'/5031, l='MpServer', x=-253.05, y=28.62, z=322.30], pb['Mooshroom'/5049, l='MpServer', x=-163.63, y=58.00, z=215.41], py['Minecart'/5048, l='MpServer', x=-172.50, y=49.50, z=213.50], qr['Zombie'/5047, l='MpServer', x=-174.53, y=62.00, z=194.25], ays['riz0671'/5031, l='MpServer', x=-259.70, y=28.62, z=322.86], ays['riz0671'/5031, l='MpServer', x=-208.30, y=-264.55, z=271.64], ow['Bat'/748917, l='MpServer', x=-31.66, y=51.10, z=225.59], ow['Bat'/748921, l='MpServer', x=-25.48, y=53.77, z=233.72], ays['riz0671'/5031, l='MpServer', x=-236.70, y=-264.03, z=258.44], qn['Skeleton'/5063, l='MpServer', x=-138.50, y=54.00, z=240.91], ays['riz0671'/5031, l='MpServer', x=-246.71, y=28.62, z=325.00], qr['Zombie'/709814, l='MpServer', x=-152.16, y=54.00, z=168.25], qr['Zombie'/709815, l='MpServer', x=-156.72, y=54.00, z=164.88]]
	Retry entities: 0 total; []
Stacktrace:
	at ayp.a(SourceFile:281)
	at net.minecraft.client.Minecraft.b(SourceFile:1871)
	at net.minecraft.client.Minecraft.run(SourceFile:543)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 1.4.6
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_07, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 267216360 bytes (254 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 24660 (1380960 bytes; 1 MB) allocated, 19914 (1115184 bytes; 1 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	LWJGL: 2.4.2
	OpenGL: Intel Pineview Platform GL version 1.4.0 - Build 8.14.10.2117, Intel
	Is Modded: Very likely; Jar signature invalidated
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 2457 (137592 bytes; 0 MB) allocated, 746 (41776 bytes; 0 MB) used