java.lang.NullPointerException
	at adv.a(SourceFile:82)
	at adt.<init>(SourceFile:26)
	at ads.a(SourceFile:52)
	at ads.b(SourceFile:61)
	at adv.a(SourceFile:61)
	at aey.a(SourceFile:926)
	at act.a(SourceFile:100)
	at adi.a(SourceFile:166)
	at aqm.c(SourceFile:73)
	at bhv.p(SourceFile:3783)
	at bhv.b(SourceFile:122)
	at bhd.a(SourceFile:158)
	at bho.a(SourceFile:1151)
	at bhh.a(SourceFile:817)
	at bhh.b(SourceFile:697)
	at avx.V(SourceFile:713)
	at avx.e(SourceFile:642)
	at net.minecraft.client.main.Main.main(SourceFile:103)

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

Time: 5/9/2013 5:05 μμ
Description: Invalid Biome id

java.lang.NullPointerException
	at adv.a(SourceFile:82)
	at adt.<init>(SourceFile:26)
	at ads.a(SourceFile:52)
	at ads.b(SourceFile:61)
	at adv.a(SourceFile:61)
	at aey.a(SourceFile:926)
	at act.a(SourceFile:100)
	at adi.a(SourceFile:166)
	at aqm.c(SourceFile:73)
	at bhv.p(SourceFile:3783)
	at bhv.b(SourceFile:122)
	at bhd.a(SourceFile:158)
	at bho.a(SourceFile:1151)
	at bhh.a(SourceFile:817)
	at bhh.b(SourceFile:697)
	at avx.V(SourceFile:713)
	at avx.e(SourceFile:642)
	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:
---------------------------------------------------------------------------------------

-- DownfallBlock --
Details:
	downfalls[] size: 256
	x: 0
	z: 0
	w: 16
	h: 16
Stacktrace:
	at adv.a(SourceFile:82)
	at adt.<init>(SourceFile:26)
	at ads.a(SourceFile:52)
	at ads.b(SourceFile:61)
	at adv.a(SourceFile:61)
	at aey.a(SourceFile:926)
	at act.a(SourceFile:100)
	at adi.a(SourceFile:166)
	at aqm.c(SourceFile:73)
	at bhv.p(SourceFile:3783)
	at bhv.b(SourceFile:122)
	at bhd.a(SourceFile:158)
	at bho.a(SourceFile:1151)
	at bhh.a(SourceFile:817)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bfg['kosmmart'/120, l='MpServer', x=48,61, y=99,70, z=499,12]]
	Chunk stats: MultiplayerChunkCache: 260, 260
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (48,64,248), Chunk: (at 0,4,8 in 3,15; contains blocks 48,0,240 to 63,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 751 game time, 751 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: 78 total; [ui['Skeleton'/8745, l='MpServer', x=-3,50, y=43,00, z=494,50], un['Zombie'/7602, l='MpServer', x=35,41, y=46,00, z=489,44], uk['Spider'/7604, l='MpServer', x=37,25, y=46,00, z=491,28], un['Zombie'/7607, l='MpServer', x=-8,50, y=24,00, z=433,50], un['Zombie'/7606, l='MpServer', x=-9,50, y=24,00, z=432,50], sd['Bat'/8765, l='MpServer', x=10,03, y=55,00, z=516,03], sd['Bat'/7561, l='MpServer', x=84,47, y=43,55, z=416,41], ui['Skeleton'/8954, l='MpServer', x=79,50, y=12,00, z=561,50], ui['Skeleton'/8955, l='MpServer', x=78,50, y=12,00, z=560,50], un['Zombie'/6453, l='MpServer', x=91,50, y=36,00, z=419,50], un['Zombie'/6454, l='MpServer', x=94,50, y=36,00, z=419,50], tw['Creeper'/8907, l='MpServer', x=-12,50, y=41,00, z=517,50], ui['Skeleton'/8908, l='MpServer', x=-17,50, y=41,00, z=515,50], ui['Skeleton'/8922, l='MpServer', x=-5,50, y=37,00, z=482,50], tw['Creeper'/7462, l='MpServer', x=91,50, y=37,00, z=432,50], tw['Creeper'/8845, l='MpServer', x=93,50, y=55,00, z=425,50], sd['Bat'/8836, l='MpServer', x=-25,34, y=37,00, z=514,84], tw['Creeper'/6487, l='MpServer', x=-31,50, y=51,00, z=419,50], tw['Creeper'/9079, l='MpServer', x=97,50, y=39,00, z=457,50], tw['Creeper'/9078, l='MpServer', x=98,50, y=39,00, z=458,50], un['Zombie'/9081, l='MpServer', x=97,50, y=39,00, z=459,50], tw['Creeper'/9080, l='MpServer', x=101,50, y=39,00, z=454,50], tw['Creeper'/7420, l='MpServer', x=46,50, y=19,00, z=469,50], uk['Spider'/7418, l='MpServer', x=41,28, y=20,00, z=477,66], ui['Skeleton'/7417, l='MpServer', x=44,50, y=19,00, z=467,50], sr['Squid'/7407, l='MpServer', x=111,69, y=57,91, z=429,03], sh['Horse'/7402, l='MpServer', x=-14,50, y=69,00, z=540,50], sh['Horse'/7403, l='MpServer', x=-17,87, y=68,00, z=542,13], sh['Horse'/7401, l='MpServer', x=-17,50, y=68,00, z=540,50], un['Zombie'/7389, l='MpServer', x=29,50, y=36,00, z=431,50], un['Zombie'/7388, l='MpServer', x=29,50, y=36,00, z=430,50], tw['Creeper'/9016, l='MpServer', x=-25,50, y=44,00, z=545,50], uk['Spider'/7316, l='MpServer', x=28,34, y=16,00, z=476,09], bfg['kosmmart'/120, l='MpServer', x=48,61, y=99,70, z=499,12], un['Zombie'/9166, l='MpServer', x=-28,50, y=48,00, z=529,50], tw['Creeper'/9154, l='MpServer', x=57,50, y=18,00, z=461,50], un['Zombie'/6266, l='MpServer', x=94,50, y=36,00, z=421,50], un['Zombie'/6265, l='MpServer', x=93,50, y=36,00, z=418,50], tx['Enderman'/7195, l='MpServer', x=21,09, y=16,00, z=463,84], tx['Enderman'/7196, l='MpServer', x=19,50, y=16,00, z=464,50], tx['Enderman'/7197, l='MpServer', x=15,31, y=16,00, z=458,25], un['Zombie'/7198, l='MpServer', x=19,50, y=16,00, z=462,50], un['Zombie'/7176, l='MpServer', x=42,50, y=41,00, z=490,78], un['Zombie'/7175, l='MpServer', x=38,78, y=40,00, z=490,44], un['Zombie'/8280, l='MpServer', x=98,50, y=38,00, z=415,50], sd['Bat'/8304, l='MpServer', x=31,59, y=15,24, z=470,09], sd['Bat'/8315, l='MpServer', x=-13,16, y=45,15, z=500,47], tw['Creeper'/7121, l='MpServer', x=119,50, y=23,00, z=436,50], tw['Creeper'/8236, l='MpServer', x=49,50, y=19,00, z=477,50], tw['Creeper'/8237, l='MpServer', x=52,50, y=19,00, z=472,50], tw['Creeper'/8117, l='MpServer', x=46,50, y=14,00, z=431,50], sd['Bat'/5921, l='MpServer', x=75,72, y=45,90, z=436,88], tw['Creeper'/8011, l='MpServer', x=-24,50, y=59,00, z=502,50], tw['Creeper'/8010, l='MpServer', x=-23,50, y=59,00, z=500,50], ui['Skeleton'/6914, l='MpServer', x=96,50, y=37,00, z=413,50], ui['Skeleton'/6912, l='MpServer', x=96,50, y=37,00, z=414,50], tw['Creeper'/8049, l='MpServer', x=58,50, y=35,00, z=443,50], un['Zombie'/8050, l='MpServer', x=52,08, y=35,00, z=442,79], un['Zombie'/8051, l='MpServer', x=51,50, y=35,00, z=435,50], sd['Bat'/6968, l='MpServer', x=-16,25, y=14,74, z=428,34], un['Zombie'/8365, l='MpServer', x=95,50, y=35,00, z=423,50], un['Zombie'/8366, l='MpServer', x=93,29, y=34,00, z=425,50], un['Zombie'/7998, l='MpServer', x=93,50, y=37,00, z=471,50], sd['Bat'/7902, l='MpServer', x=30,25, y=43,00, z=474,31], sd['Bat'/7904, l='MpServer', x=0,34, y=40,66, z=486,94], sd['Bat'/6868, l='MpServer', x=101,34, y=31,00, z=412,25], tw['Creeper'/6910, l='MpServer', x=22,78, y=50,00, z=463,50], un['Zombie'/8510, l='MpServer', x=26,50, y=16,00, z=469,50], un['Zombie'/8509, l='MpServer', x=26,50, y=16,00, z=473,50], un['Zombie'/8695, l='MpServer', x=82,50, y=19,00, z=506,50], un['Zombie'/7786, l='MpServer', x=110,50, y=18,00, z=495,50], un['Zombie'/7788, l='MpServer', x=109,50, y=18,00, z=495,50], uk['Spider'/8605, l='MpServer', x=-30,50, y=17,00, z=514,50], uk['Spider'/8606, l='MpServer', x=-27,50, y=17,00, z=512,50], sd['Bat'/7688, l='MpServer', x=15,91, y=46,27, z=483,50], sd['Bat'/7687, l='MpServer', x=24,50, y=45,10, z=479,25], sd['Bat'/7686, l='MpServer', x=47,95, y=40,81, z=455,30], tw['Creeper'/6781, l='MpServer', x=58,50, y=35,00, z=429,97]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at bfb.a(SourceFile:285)
	at avx.b(SourceFile:1813)
	at avx.e(SourceFile:651)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w36a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 176535600 bytes (168 MB) / 439615488 bytes (419 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 5491 (307496 bytes; 0 MB) allocated, 1007 (56392 bytes; 0 MB) used
	Suspicious classes: [com.ibm.icu.text.ArabicShapingException], [gnu.trove.TIntCollection], [gnu.trove.impl.HashFunctions, PrimeFinder], [gnu.trove.impl.hash.THash, TPrimitiveHash, TIntIntHash], [gnu.trove.iterator.TIterator, TAdvancingIterator, TIntIntIterator], [gnu.trove.map.TIntIntMap], [gnu.trove.map.hash.TIntIntHashMap], [gnu.trove.procedure.TIntIntProcedure], [gnu.trove.set.TIntSet]
	IntCache: cache: 1, tcache: 36, allocated: 12, tallocated: 94
	Launched Version: 13w36a
	LWJGL: 2.9.0
	OpenGL: GeForce GT 220/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: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 2419 (135464 bytes; 0 MB) allocated, 280 (15680 bytes; 0 MB) used