Hopper: java.lang.NullPointerException

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-139192/

Crash:

java.lang.NullPointerException
	at aef.a(SourceFile:82)

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

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 12.09.13 16:54
Description: Invalid Biome id

java.lang.ArrayIndexOutOfBoundsException: 2049
	at aef.a(SourceFile:82)
	at aed.<init>(SourceFile:26)
	at aec.a(SourceFile:52)
	at aec.b(SourceFile:61)
	at aef.a(SourceFile:61)
	at afi.a(SourceFile:926)
	at adc.a(SourceFile:101)
	at adc.a(SourceFile:1053)
	at bhx.i(SourceFile:1193)
	at bhx.a(SourceFile:787)
	at bhx.b(SourceFile:697)
	at awl.V(SourceFile:717)
	at awl.e(SourceFile:646)
	at net.minecraft.client.main.Main.main(SourceFile:103)


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

-- Head --
Stacktrace:
	at aef.a(SourceFile:82)

-- DownfallBlock --
Details:
	downfalls[] size: 256
	x: 0
	z: 0
	w: 16
	h: 16
Stacktrace:
	at aef.a(SourceFile:82)
	at aed.<init>(SourceFile:26)
	at aec.a(SourceFile:52)
	at aec.b(SourceFile:61)
	at aef.a(SourceFile:61)
	at afi.a(SourceFile:926)

-- Coordinates of biome request --
Details:
	Location: World: (8,0,8), Chunk: (at 8,0,8 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)
Stacktrace:
	at adc.a(SourceFile:101)
	at adc.a(SourceFile:1053)
	at bhx.i(SourceFile:1193)
	at bhx.a(SourceFile:787)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfw['keldios34'/105, l='MpServer', x=8,50, y=66,62, z=8,50]]
	Chunk stats: MultiplayerChunkCache: 0, 0
	Level seed: 0
	Level generator: ID 02 - largeBiomes, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (356,64,115), Chunk: (at 4,4,3 in 22,7; contains blocks 352,0,112 to 367,255,127), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 8070315 game time, 8116943 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 1 total; [bfw['keldios34'/105, l='MpServer', x=8,50, y=66,62, z=8,50]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfr.a(SourceFile:285)
	at awl.b(SourceFile:1821)
	at awl.e(SourceFile:655)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w37a
	Operating System: Windows XP (x86) version 5.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 109615600 bytes (104 MB) / 189612032 bytes (180 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 10819 (605864 bytes; 0 MB) allocated, 10819 (605864 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 132
	Launched Version: 13w37a
	LWJGL: 2.9.0
	OpenGL: GeForce 210/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: Deutsch (Deutschland)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 11 (616 bytes; 0 MB) allocated, 11 (616 bytes; 0 MB) used

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-139192/10192313/