my account keeps crashing

Please attach the crash report, without that nobody can fix anything.

— BEGIN ERROR REPORT 72ade67f --------
Full report at:
/Users/Justin/Library/Application Support/minecraft/crash-reports/crash-2012-12-23_09.35.47-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 12/23/12 9:35 AM

– Head –
Stacktrace:
at java.nio.Buffer.checkIndex(Buffer.java:512)
at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:248)
at org.lwjgl.input.Keyboard.isKeyDown(Keyboard.java:399)
at avs.a(SourceFile:267)
at aul.n(SourceFile:153)
at aul.m(SourceFile:115)

– Affected screen –
Details:
Screen name: avs

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [ays['Juss511'/625, l='MpServer', x=-643.71, y=5.62, z=78.70]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-933,4,219), Chunk: (at 11,0,11 in -59,13; contains blocks -944,0,208 to -929,255,223), Region: (-2,0; contains chunks -64,0 to -33,31, blocks -1024,0,0 to -513,255,511)
Level time: 5572994 game time, 5935498 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: 93 total; [mg['Painting'/326, l='MpServer', x=-760.50, y=5.00, z=72.94], mg['Painting'/632, l='MpServer', x=-729.94, y=46.00, z=62.50], mg['Painting'/642, l='MpServer', x=-720.50, y=45.50, z=79.94], mg['Painting'/633, l='MpServer', x=-720.50, y=45.50, z=58.06], mc['entity.ItemFrame.name'/516, l='MpServer', x=-749.50, y=5.50, z=36.06], mg['Painting'/726, l='MpServer', x=-640.94, y=12.50, z=31.50], mc['entity.ItemFrame.name'/514, l='MpServer', x=-745.50, y=5.50, z=37.94], mg['Painting'/725, l='MpServer', x=-640.94, y=15.50, z=21.00], mc['entity.ItemFrame.name'/515, l='MpServer', x=-743.50, y=5.50, z=36.06], mg['Painting'/640, l='MpServer', x=-729.94, y=47.00, z=69.50], mg['Painting'/641, l='MpServer', x=-728.00, y=45.50, z=79.94], mg['Painting'/734, l='MpServer', x=-633.06, y=14.00, z=25.00], mc['entity.ItemFrame.name'/317, l='MpServer', x=-756.50, y=5.50, z=36.06], mg['Painting'/733, l='MpServer', x=-633.06, y=15.00, z=30.00], mc['entity.ItemFrame.name'/316, l='MpServer', x=-759.50, y=5.50, z=37.94], mg['Painting'/732, l='MpServer', x=-636.00, y=14.00, z=18.06], mc['entity.ItemFrame.name'/319, l='MpServer', x=-761.94, y=5.50, z=41.50], mg['Painting'/731, l='MpServer', x=-633.06, y=15.00, z=21.00], mc['entity.ItemFrame.name'/318, l='MpServer', x=-761.94, y=5.50, z=36.50], mg['Painting'/684, l='MpServer', x=-718.06, y=45.50, z=77.50], mg['Painting'/686, l='MpServer', x=-718.06, y=45.00, z=68.50], mg['Painting'/685, l='MpServer', x=-718.06, y=45.50, z=74.50], mg['Painting'/687, l='MpServer', x=-718.06, y=44.50, z=65.00], mg['Painting'/723, l='MpServer', x=-640.94, y=14.00, z=28.00], mg['Painting'/724, l='MpServer', x=-640.94, y=15.50, z=29.50], mg['Painting'/721, l='MpServer', x=-640.94, y=13.50, z=21.00], mg['Painting'/722, l='MpServer', x=-640.94, y=14.00, z=25.00], mg['Painting'/679, l='MpServer', x=-718.50, y=45.50, z=58.06], ow['Bat'/12810, l='MpServer', x=-633.25, y=6.77, z=31.50], mg['Painting'/326, l='MpServer', x=-760.50, y=5.00, z=72.94], mc['entity.ItemFrame.name'/327, l='MpServer', x=-760.06, y=4.50, z=68.50], ow['Bat'/15263, l='MpServer', x=-638.49, y=7.64, z=20.46], mc['entity.ItemFrame.name'/324, l='MpServer', x=-761.94, y=4.50, z=57.50], mc['entity.ItemFrame.name'/325, l='MpServer', x=-761.94, y=5.50, z=59.50], mc['entity.ItemFrame.name'/322, l='MpServer', x=-756.50, y=5.50, z=37.94], ow['Bat'/631, l='MpServer', x=-720.88, y=6.10, z=54.28], mc['entity.ItemFrame.name'/323, l='MpServer', x=-760.06, y=5.50, z=50.50], mc['entity.ItemFrame.name'/320, l='MpServer', x=-760.06, y=5.50, z=44.50], mc['entity.ItemFrame.name'/321, l='MpServer', x=-761.50, y=5.50, z=36.06], mc['entity.ItemFrame.name'/635, l='MpServer', x=-726.50, y=45.50, z=58.06], mc['entity.ItemFrame.name'/634, l='MpServer', x=-723.50, y=45.50, z=58.06], mg['Painting'/633, l='MpServer', x=-720.50, y=45.50, z=58.06], mg['Painting'/632, l='MpServer', x=-729.94, y=46.00, z=62.50], ow['Bat'/639, l='MpServer', x=-720.50, y=6.10, z=54.25], mc['entity.ItemFrame.name'/637, l='MpServer', x=-729.94, y=45.50, z=63.50], mc['entity.ItemFrame.name'/328, l='MpServer', x=-760.06, y=5.50, z=70.50], mc['entity.ItemFrame.name'/636, l='MpServer', x=-729.94, y=45.50, z=60.50], mc['entity.ItemFrame.name'/329, l='MpServer', x=-761.94, y=5.50, z=72.50], ow['Bat'/15265, l='MpServer', x=-637.86, y=4.30, z=24.51], mg['Painting'/687, l='MpServer', x=-718.06, y=44.50, z=65.00], mg['Painting'/686, l='MpServer', x=-718.06, y=45.00, z=68.50], mg['Painting'/685, l='MpServer', x=-718.06, y=45.50, z=74.50], mg['Painting'/684, l='MpServer', x=-718.06, y=45.50, z=77.50], ow['Bat'/683, l='MpServer', x=-714.25, y=6.10, z=65.56], ow['Bat'/13004, l='MpServer', x=-639.75, y=4.10, z=101.75], mc['entity.ItemFrame.name'/680, l='MpServer', x=-718.06, y=46.50, z=61.50], mg['Painting'/679, l='MpServer', x=-718.50, y=45.50, z=58.06], ow['Bat'/678, l='MpServer', x=-714.25, y=6.10, z=55.25], ow['Bat'/677, l='MpServer', x=-714.25, y=6.10, z=59.31], mg['Painting'/698, l='MpServer', x=-694.06, y=5.00, z=116.00], ow['Bat'/691, l='MpServer', x=-714.25, y=6.10, z=80.16], mc['entity.ItemFrame.name'/688, l='MpServer', x=-718.06, y=45.50, z=79.50], mc['entity.ItemFrame.name'/689, l='MpServer', x=-718.06, y=44.50, z=70.50], mg['Painting'/641, l='MpServer', x=-728.00, y=45.50, z=79.94], mg['Painting'/640, l='MpServer', x=-729.94, y=47.00, z=69.50], mc['entity.ItemFrame.name'/643, l='MpServer', x=-729.94, y=45.50, z=77.50], mg['Painting'/642, l='MpServer', x=-720.50, y=45.50, z=79.94], mg['Painting'/739, l='MpServer', x=-634.50, y=14.50, z=32.94], mg['Painting'/738, l='MpServer', x=-638.00, y=15.00, z=32.94], ow['Bat'/736, l='MpServer', x=-633.25, y=5.76, z=25.41], ays['Juss511'/625, l='MpServer', x=-643.71, y=5.62, z=78.70], mg['Painting'/742, l='MpServer', x=-640.00, y=16.00, z=32.94], mg['Painting'/741, l='MpServer', x=-639.00, y=11.00, z=34.06], mg['Painting'/740, l='MpServer', x=-640.00, y=13.00, z=32.94], mg['Painting'/739, l='MpServer', x=-634.50, y=14.50, z=32.94], mg['Painting'/738, l='MpServer', x=-638.00, y=15.00, z=32.94], mg['Painting'/740, l='MpServer', x=-640.00, y=13.00, z=32.94], mg['Painting'/742, l='MpServer', x=-640.00, y=16.00, z=32.94], mg['Painting'/741, l='MpServer', x=-639.00, y=11.00, z=34.06], mg['Painting'/698, l='MpServer', x=-694.06, y=5.00, z=116.00], mc['entity.ItemFrame.name'/709, l='MpServer', x=-666.50, y=5.50, z=-60.06], ow['Bat'/710, l='MpServer', x=-671.75, y=9.10, z=50.75], mg['Painting'/731, l='MpServer', x=-633.06, y=15.00, z=21.00], mg['Painting'/732, l='MpServer', x=-636.00, y=14.00, z=18.06], mg['Painting'/733, l='MpServer', x=-633.06, y=15.00, z=30.00], mg['Painting'/734, l='MpServer', x=-633.06, y=14.00, z=25.00], ow['Bat'/735, l='MpServer', x=-633.61, y=4.33, z=29.45], mg['Painting'/721, l='MpServer', x=-640.94, y=13.50, z=21.00], mg['Painting'/722, l='MpServer', x=-640.94, y=14.00, z=25.00], mg['Painting'/723, l='MpServer', x=-640.94, y=14.00, z=28.00], mg['Painting'/724, l='MpServer', x=-640.94, y=15.50, z=29.50], mg['Painting'/725, l='MpServer', x=-640.94, y=15.50, z=21.00], mg['Painting'/726, l='MpServer', x=-640.94, y=12.50, z=31.50]]
Retry entities: 0 total; []
Stacktrace:
at ayp.a(SourceFile:281)
at net.minecraft.client.Minecraft.b(SourceFile:1871)
at net.minecraft.client.Minecraft.run(SourceFile:543)
at java.lang.Thread.run(Thread.java:680)

– System Details –
Details:
Minecraft Version: 1.4.6
Operating System: Mac OS X (x86_64) version 10.6.8
Java Version: 1.6.0_37, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 453619600 bytes (432 MB) / 554369024 bytes (528 MB) up to 1069416448 bytes (1019 MB)
JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
AABB Pool Size: 453 (25368 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: NVIDIA GeForce 8600M GT OpenGL Engine GL version 2.1 NVIDIA-1.6.36, NVIDIA Corporation
Is Modded: Probably not. Jar signature remains and client brand is untouched.
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: 66 (3696 bytes; 0 MB) allocated, 17 (952 bytes; 0 MB) used

java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Buffer.java:512)
at java.nio.DirectByteBuffer.get(DirectByteBuffer.java:248)
at org.lwjgl.input.Keyboard.isKeyDown(Keyboard.java:399)
at avs.a(SourceFile:267)
at aul.n(SourceFile:153)
at aul.m(SourceFile:115)
at net.minecraft.client.Minecraft.l(SourceFile:1086)
at net.minecraft.client.Minecraft.J(SourceFile:582)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Thread.java:680)
— END ERROR REPORT 8fd7681a ----------

Full report at:
/Users/Justin/Library/Application Support/minecraft/crash-reports/crash-2012-12-23_09.35.47-client.txt
Please show that file to Mojang, NOT just this screen!

Duplicate of MC-3409.

so basically, what do i have to do to fix it?