Hopper: java.lang.IllegalArgumentException: Biome ID is out of bounds: 2049

This is an automatically generated report based from the following crash: http://hopper.minecraft.net/crashes/minecraft/MCX-389695/

Crash:

java.lang.IllegalArgumentException: Biome ID is out of bounds: 2049
	at agd.d(SourceFile:481)

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

---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 17/10/13 19:58
Description: Comparing biomes

java.lang.IllegalArgumentException: Biome ID is out of bounds: 2049
	at agd.d(SourceFile:481)
	at avs.a(SourceFile:159)
	at avw.a(SourceFile:97)
	at avv.a(SourceFile:13)
	at awh.a(SourceFile:20)
	at avg.a(SourceFile:16)
	at awh.a(SourceFile:20)
	at awb.a(SourceFile:13)
	at awh.a(SourceFile:20)
	at awh.a(SourceFile:20)
	at awc.a(SourceFile:15)
	at awa.a(SourceFile:24)
	at awg.a(SourceFile:23)
	at agk.a(SourceFile:79)
	at agi.<init>(SourceFile:26)
	at agh.a(SourceFile:52)
	at agh.b(SourceFile:61)
	at agk.a(SourceFile:61)
	at aoc.a(SourceFile:933)
	at afk.a(SourceFile:116)
	at afk.a(SourceFile:1047)
	at blc.i(SourceFile:1321)
	at blc.a(SourceFile:918)
	at blc.b(SourceFile:813)
	at ayw.ac(SourceFile:776)
	at ayw.e(SourceFile:700)
	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 agd.d(SourceFile:481)

-- Biomes being compared --
Details:
	Biome A ID: 2049
	Biome B ID: 0
	Biome A: ~~ERROR~~ IllegalArgumentException: Biome ID is out of bounds: 2049
	Biome B: agx@2df8e5e4
Stacktrace:
	at avs.a(SourceFile:159)
	at avw.a(SourceFile:97)
	at avv.a(SourceFile:13)
	at awh.a(SourceFile:20)
	at avg.a(SourceFile:16)
	at awh.a(SourceFile:20)
	at awb.a(SourceFile:13)
	at awh.a(SourceFile:20)
	at awh.a(SourceFile:20)
	at awc.a(SourceFile:15)
	at awa.a(SourceFile:24)
	at awg.a(SourceFile:23)
	at agk.a(SourceFile:79)
	at agi.<init>(SourceFile:26)
	at agh.a(SourceFile:52)
	at agh.b(SourceFile:61)
	at agk.a(SourceFile:61)
	at aoc.a(SourceFile:933)

-- 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 afk.a(SourceFile:116)
	at afk.a(SourceFile:1047)
	at blc.i(SourceFile:1321)
	at blc.a(SourceFile:918)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [biw['scottydog75'/201, l='MpServer', x=8.50, y=66.62, z=8.50]]
	Chunk stats: MultiplayerChunkCache: 0, 0
	Level seed: 0
	Level generator: ID 03 - amplified, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (172,64,256), Chunk: (at 12,4,0 in 10,16; contains blocks 160,0,256 to 175,255,271), 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: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 1 total; [biw['scottydog75'/201, 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 bir.a(SourceFile:284)
	at ayw.b(SourceFile:1928)
	at ayw.e(SourceFile:709)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w42a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_15, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 369755368 bytes (352 MB) / 506265600 bytes (482 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 10003 (560168 bytes; 0 MB) allocated, 10003 (560168 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 13, allocated: 12, tallocated: 94
	Launched Version: 13w42a
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 5700 Series GL version 4.2.12422 Compatibility Profile Context 13.152.0.0, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 18 (1008 bytes; 0 MB) allocated, 18 (1008 bytes; 0 MB) used
	Anisotropic Filtering: Off (1)

You can see this full report at http://hopper.minecraft.net/crashes/minecraft/MCX-389695/18834962/