Crash report, please help

---- Minecraft Crash Report ----
// Why did you do that?

Time: 7/4/13 4:01 PM
Description: Rendering screen

java.lang.ArrayIndexOutOfBoundsException: -100
	at org.lwjgl.input.Keyboard.getKeyName(Keyboard.java:429)
	at auu.a(SourceFile:79)
	at bet.b(SourceFile:718)
	at atn.S(SourceFile:685)
	at atn.d(SourceFile:618)
	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 org.lwjgl.input.Keyboard.getKeyName(Keyboard.java:429)
	at auu.a(SourceFile:79)

-- Screen render details --
Details:
	Screen name: auu
	Mouse location: Scaled: (180, 125). Absolute: (361, 229)
	Screen size: Scaled: (427, 240). Absolute: (854, 480). Scale factor of 2

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bcx['Player'/69, l='MpServer', x=206.50, y=64.62, z=-85.50]]
	Chunk stats: MultiplayerChunkCache: 110
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (216,64,-92), Chunk: (at 8,4,4 in 13,-6; contains blocks 208,0,-96 to 223,255,-81), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 20 game time, 20 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: 69 total; [to['Skeleton'/685, l='MpServer', x=210.50, y=36.00, z=-69.50], to['Skeleton'/414, l='MpServer', x=284.50, y=19.00, z=-84.50], rz['Squid'/140, l='MpServer', x=145.53, y=50.00, z=-105.47], rz['Squid'/143, l='MpServer', x=144.41, y=50.00, z=-106.59], rz['Squid'/130, l='MpServer', x=270.61, y=48.93, z=-30.70], tt['Zombie'/286, l='MpServer', x=244.50, y=24.00, z=-123.50], rv['Pig'/17, l='MpServer', x=190.50, y=70.00, z=-147.22], rv['Pig'/16, l='MpServer', x=191.78, y=70.00, z=-149.78], rv['Pig'/19, l='MpServer', x=189.50, y=70.00, z=-150.50], rv['Pig'/18, l='MpServer', x=190.19, y=70.00, z=-148.50], rl['Bat'/262, l='MpServer', x=220.79, y=34.27, z=-53.96], rl['Bat'/263, l='MpServer', x=221.48, y=34.31, z=-52.73], tc['Creeper'/260, l='MpServer', x=257.50, y=16.00, z=-9.50], to['Skeleton'/697, l='MpServer', x=243.50, y=19.00, z=-148.50], tc['Creeper'/695, l='MpServer', x=244.50, y=19.00, z=-145.50], rz['Squid'/145, l='MpServer', x=223.50, y=50.00, z=-46.50], rl['Bat'/264, l='MpServer', x=220.48, y=34.27, z=-52.09], rz['Squid'/146, l='MpServer', x=225.50, y=50.00, z=-47.50], rz['Squid'/147, l='MpServer', x=227.70, y=50.08, z=-47.53], rz['Squid'/148, l='MpServer', x=228.50, y=50.00, z=-44.50], tc['Creeper'/268, l='MpServer', x=283.50, y=28.00, z=-40.50], tt['Zombie'/516, l='MpServer', x=184.50, y=24.00, z=-11.50], rw['Sheep'/34, l='MpServer', x=270.50, y=68.00, z=-116.16], rw['Sheep'/35, l='MpServer', x=272.50, y=69.00, z=-118.50], tc['Creeper'/307, l='MpServer', x=284.50, y=44.00, z=-96.50], rw['Sheep'/32, l='MpServer', x=269.50, y=68.00, z=-118.50], rw['Sheep'/33, l='MpServer', x=268.50, y=68.00, z=-115.50], tq['Spider'/512, l='MpServer', x=232.50, y=19.00, z=-17.50], rz['Squid'/163, l='MpServer', x=155.65, y=55.98, z=-72.29], rz['Squid'/162, l='MpServer', x=156.49, y=56.00, z=-74.64], tc['Creeper'/647, l='MpServer', x=283.50, y=29.00, z=-24.50], rz['Squid'/161, l='MpServer', x=158.73, y=56.09, z=-74.99], tc['Creeper'/646, l='MpServer', x=283.50, y=29.00, z=-29.50], rz['Squid'/164, l='MpServer', x=156.59, y=56.00, z=-73.47], rl['Bat'/289, l='MpServer', x=246.34, y=39.14, z=-119.34], rl['Bat'/535, l='MpServer', x=143.47, y=23.00, z=-95.56], rl['Bat'/291, l='MpServer', x=244.58, y=39.00, z=-114.11], rl['Bat'/534, l='MpServer', x=146.56, y=23.00, z=-91.58], rl['Bat'/292, l='MpServer', x=245.50, y=39.19, z=-121.55], tt['Zombie'/667, l='MpServer', x=196.50, y=20.00, z=-37.50], to['Skeleton'/419, l='MpServer', x=283.50, y=19.00, z=-85.50], to['Skeleton'/421, l='MpServer', x=281.50, y=19.00, z=-79.50], to['Skeleton'/420, l='MpServer', x=281.50, y=19.00, z=-83.50], rz['Squid'/205, l='MpServer', x=184.50, y=60.00, z=-26.50], rz['Squid'/204, l='MpServer', x=188.67, y=59.89, z=-26.42], rz['Squid'/203, l='MpServer', x=183.50, y=60.00, z=-23.50], rz['Squid'/202, l='MpServer', x=188.49, y=60.00, z=-25.42], rz['Squid'/196, l='MpServer', x=147.50, y=59.00, z=-26.50], rz['Squid'/193, l='MpServer', x=145.96, y=58.93, z=-34.56], rz['Squid'/195, l='MpServer', x=147.50, y=59.00, z=-29.50], rz['Squid'/194, l='MpServer', x=149.50, y=59.00, z=-34.50], rz['Squid'/216, l='MpServer', x=167.50, y=58.00, z=-44.59], rz['Squid'/217, l='MpServer', x=169.50, y=58.00, z=-47.50], rz['Squid'/212, l='MpServer', x=171.50, y=51.00, z=-45.50], rz['Squid'/213, l='MpServer', x=166.50, y=51.00, z=-44.50], rz['Squid'/214, l='MpServer', x=167.50, y=58.00, z=-43.47], rl['Bat'/333, l='MpServer', x=242.77, y=28.32, z=-148.57], rz['Squid'/215, l='MpServer', x=167.54, y=58.01, z=-41.07], rl['Bat'/330, l='MpServer', x=285.09, y=32.56, z=-16.16], rl['Bat'/89, l='MpServer', x=197.92, y=15.24, z=-56.42], rl['Bat'/331, l='MpServer', x=285.50, y=32.63, z=-18.75], rz['Squid'/210, l='MpServer', x=174.02, y=51.16, z=-46.62], rz['Squid'/211, l='MpServer', x=170.50, y=51.00, z=-42.50], rz['Squid'/239, l='MpServer', x=162.50, y=62.00, z=-136.50], tc['Creeper'/493, l='MpServer', x=270.50, y=33.00, z=-138.50], bcx['Player'/69, l='MpServer', x=206.50, y=64.62, z=-85.50], rz['Squid'/242, l='MpServer', x=160.50, y=62.00, z=-144.50], rz['Squid'/240, l='MpServer', x=163.50, y=62.00, z=-139.50], rz['Squid'/241, l='MpServer', x=158.50, y=62.00, z=-141.50]]
	Retry entities: 0 total; []
Stacktrace:
	at bcu.a(SourceFile:284)
	at atn.b(SourceFile:1743)
	at atn.d(SourceFile:627)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.1
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 125187848 bytes (119 MB) / 261271552 bytes (249 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 18307 (1025192 bytes; 0 MB) allocated, 595 (33320 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Launched Version: 1.6.1
	LWJGL: 2.9.0
	OpenGL: GeForce GTX 280/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 Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 3098 (173488 bytes; 0 MB) allocated, 1728 (96768 bytes; 0 MB) used