Hopper: java.lang.ArrayIndexOutOfBoundsException: -1

java.lang.ArrayIndexOutOfBoundsException: -1
	at adw.a(SourceFile:123)

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 9/6/13 10:34 AM
Description: Invalid Biome id

java.lang.ArrayIndexOutOfBoundsException: 515
	at adw.a(SourceFile:123)
	at agc.a(SourceFile:90)
	at agc.d(SourceFile:189)
	at kc.c(SourceFile:72)
	at kb.<init>(SourceFile:28)
	at ka.a(SourceFile:209)
	at ka.d(SourceFile:343)
	at hw.d(SourceFile:211)
	at kl.a(SourceFile:272)
	at fd.a(SourceFile:136)
	at cv.b(SourceFile:64)
	at kl.e(SourceFile:63)
	at ko.b(SourceFile:37)
	at bnq.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.t(SourceFile:481)
	at net.minecraft.server.MinecraftServer.s(SourceFile:398)
	at bnn.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:332)
	at hr.run(SourceFile:575)


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

-- Head --
Stacktrace:
	at adw.a(SourceFile:123)

-- RawBiomeBlock --
Details:
	biomes[] size: 256
	x: -74
	z: -26
	w: 10
	h: 10
Stacktrace:
	at adw.a(SourceFile:123)
	at agc.a(SourceFile:90)
	at agc.d(SourceFile:189)

-- Chunk to be generated --
Details:
	Location: -18,-6
	Position hash: -21474836498
	Generator: RandomLevelSource
Stacktrace:
	at kc.c(SourceFile:72)
	at kb.<init>(SourceFile:28)
	at ka.a(SourceFile:209)
	at ka.d(SourceFile:343)
	at hw.d(SourceFile:211)
	at kl.a(SourceFile:272)
	at fd.a(SourceFile:136)
	at cv.b(SourceFile:64)
	at kl.e(SourceFile:63)

-- Ticking connection --
Details:
	Connection: kl@9a9447
Stacktrace:
	at ko.b(SourceFile:37)
	at bnq.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.t(SourceFile:481)
	at net.minecraft.server.MinecraftServer.s(SourceFile:398)
	at bnn.s(SourceFile:124)
	at net.minecraft.server.MinecraftServer.run(SourceFile:332)
	at hr.run(SourceFile:575)

-- System Details --
Details:
	Minecraft Version: 13w36b
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
	Memory: 252609472 bytes (240 MB) / 518979584 bytes (494 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 5816 (325696 bytes; 0 MB) allocated, 2093 (117208 bytes; 0 MB) used
	IntCache: cache: 2, tcache: 28, allocated: 16, tallocated: 125
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 1650 (92400 bytes; 0 MB) allocated, 1473 (82488 bytes; 0 MB) used
	Player Count: 1 / 8; [kg['ssddforme'/205907, l='Biomes 2', x=-268.19, y=76.64, z=79.72]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.