Hopper: java.lang.IndexOutOfBoundsException: Index: 53, Size: 45

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-294209/

Crash:

java.lang.IndexOutOfBoundsException: Index: 53, Size: 45
	at java.util.ArrayList.rangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at ux.a(SourceFile:282)
	at bcz.a(SourceFile:295)
	at awv.a(SourceFile:582)
	at awv.a(SourceFile:606)
	at awv.a(SourceFile:591)
	at awb.n(SourceFile:149)
	at awb.m(SourceFile:111)

The following is the first clean report made public about this crash:

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 11/10/13 15:10
Description: Updating screen events

java.lang.IndexOutOfBoundsException: Index: 51, Size: 45
	at java.util.ArrayList.rangeCheck(Unknown Source)
	at java.util.ArrayList.get(Unknown Source)
	at ux.a(SourceFile:282)
	at bcz.a(SourceFile:295)
	at awv.a(SourceFile:582)
	at awv.a(SourceFile:606)
	at awv.a(SourceFile:591)
	at awb.n(SourceFile:149)
	at awb.m(SourceFile:111)
	at ats.k(SourceFile:1158)
	at ats.S(SourceFile:663)
	at ats.d(SourceFile:619)
	at net.minecraft.client.main.Main.main(SourceFile:101)


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 ux.a(SourceFile:282)
	at bcz.a(SourceFile:295)
	at awv.a(SourceFile:582)
	at awv.a(SourceFile:606)
	at awv.a(SourceFile:591)
	at awb.n(SourceFile:149)
	at awb.m(SourceFile:111)

-- Affected screen --
Details:
	Screen name: ~~ERROR~~ NullPointerException: null

-- Affected level --
Details:
	Level name: MpServer
	All players: 2 total; [bdf['ElMatiasRex'/1236, l='MpServer', x=65,42, y=193,62, z=1140,16], bev['ZahidCr4Ft'/1291, l='MpServer', x=-63,13, y=192,00, z=1162,78]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (0,64,0), Chunk: (at 0,4,0 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: 41083 game time, 10518 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 9 total; [bev['ZahidCr4Ft'/1291, l='MpServer', x=-61,53, y=197,00, z=1148,00], bdf['ElMatiasRex'/1236, l='MpServer', x=-61,44, y=193,62, z=1160,00], bev['ZahidCr4Ft'/1291, l='MpServer', x=-63,31, y=192,00, z=1160,55], bev['ZahidCr4Ft'/1291, l='MpServer', x=-61,38, y=192,00, z=1160,63], bev['ZahidCr4Ft'/1291, l='MpServer', x=-63,13, y=192,00, z=1162,78], bev['ZahidCr4Ft'/1291, l='MpServer', x=-63,13, y=192,00, z=1162,78], bev['ZahidCr4Ft'/1291, l='MpServer', x=-61,48, y=192,00, z=1158,85], bdf['ElMatiasRex'/1236, l='MpServer', x=65,42, y=193,62, z=1140,16], bev['ZahidCr4Ft'/1291, l='MpServer', x=-35,53, y=202,00, z=1134,78]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bda.a(SourceFile:284)
	at ats.b(SourceFile:1761)
	at ats.d(SourceFile:628)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.2
	Operating System: Windows 8 (amd64) version 6.2
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 15038496 bytes (14 MB) / 142475264 bytes (135 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 91 (5096 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: GeForce GT 640/PCIe/SSE2 GL version 4.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Current Language: Español (España)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 62 (3472 bytes; 0 MB) allocated, 19 (1064 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-294209/16879534/