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Not sure if posting in the right place. This is my 9 year old sons game! He uses it on his PC. It stops working and goes black while in his inventory. I got a crash file to report: Hopefully this is the right spot or you can help any ways! He just wants to play...so any help, please keep the terminology easy...THANKS!!!

---- Minecraft Crash Report ----
// I let you down. Sorry
Time: 2/19/13 6:46 PM
Description: Updating screen events
java.lang.IndexOutOfBoundsException: -100
at java.nio.DirectByteBuffer.get(Unknown Source)
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(Unknown Source)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------
-- Head --
Stacktrace:
at java.nio.DirectByteBuffer.get(Unknown Source)
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['LoganN2003'/38, l='MpServer', x=-640.52, y=6.90, z=-239.50]]
Chunk stats: MultiplayerChunkCache: 395
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-943,4,-73), Chunk: (at 1,0,7 in -59,-5; contains blocks -944,0,-80 to -929,255,-65), Region: (-2,-1; contains chunks -64,-32 to -33,-1, blocks -1024,0,-512 to -513,255,-1)
Level time: 963708 game time, 1003145 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: 51 total; [px['item.tile.rail'/39, l='MpServer', x=-640.53, y=4.13, z=-239.53], qn['Skeleton'/51, l='MpServer', x=-720.50, y=4.00, z=-253.50], qc['Creeper'/55, l='MpServer', x=-717.50, y=4.00, z=-245.50], qc['Creeper'/54, l='MpServer', x=-716.50, y=4.00, z=-247.50], qc['Creeper'/53, l='MpServer', x=-716.50, y=4.00, z=-246.50], qp['Spider'/52, l='MpServer', x=-713.89, y=4.00, z=-314.60], qn['Skeleton'/59, l='MpServer', x=-683.62, y=4.00, z=-279.33], qr['Zombie'/58, l='MpServer', x=-706.13, y=4.00, z=-212.75], qr['Zombie'/57, l='MpServer', x=-718.50, y=4.00, z=-208.50], qr['Zombie'/56, l='MpServer', x=-710.19, y=4.00, z=-246.92], qn['Skeleton'/63, l='MpServer', x=-685.72, y=4.00, z=-267.25], qn['Skeleton'/62, l='MpServer', x=-684.47, y=4.00, z=-268.00], qn['Skeleton'/60, l='MpServer', x=-697.50, y=4.00, z=-210.50], qn['Skeleton'/68, l='MpServer', x=-682.00, y=4.00, z=-232.34], qn['Skeleton'/69, l='MpServer', x=-673.50, y=4.00, z=-235.50], qc['Creeper'/70, l='MpServer', x=-674.13, y=4.00, z=-230.88], qn['Skeleton'/71, l='MpServer', x=-680.15, y=4.00, z=-231.36], qc['Creeper'/64, l='MpServer', x=-680.81, y=4.00, z=-237.57], qr['Zombie'/65, l='MpServer', x=-680.82, y=4.00, z=-240.24], qp['Spider'/66, l='MpServer', x=-682.09, y=4.00, z=-240.59], qr['Zombie'/67, l='MpServer', x=-681.63, y=4.00, z=-237.44], qp['Spider'/77, l='MpServer', x=-664.22, y=4.00, z=-297.06], qr['Zombie'/78, l='MpServer', x=-663.22, y=4.00, z=-262.16], qr['Zombie'/79, l='MpServer', x=-664.58, y=4.00, z=-245.33], qp['Spider'/85, l='MpServer', x=-650.29, y=4.00, z=-281.50], ays['LoganN2003'/38, l='MpServer', x=-640.52, y=6.90, z=-239.50], qr['Zombie'/86, l='MpServer', x=-647.72, y=4.00, z=-262.94], qp['Spider'/81, l='MpServer', x=-663.50, y=4.00, z=-201.50], qp['Spider'/80, l='MpServer', x=-657.50, y=4.00, z=-194.50], qp['Spider'/83, l='MpServer', x=-656.52, y=4.00, z=-202.08], qp['Spider'/82, l='MpServer', x=-655.26, y=4.00, z=-204.01], qr['Zombie'/95, l='MpServer', x=-609.50, y=4.00, z=-289.50], qn['Skeleton'/91, l='MpServer', x=-638.47, y=4.00, z=-280.53], qn['Skeleton'/102, l='MpServer', x=-604.50, y=4.00, z=-175.50], qr['Zombie'/100, l='MpServer', x=-593.50, y=4.00, z=-214.50], qc['Creeper'/101, l='MpServer', x=-602.50, y=4.00, z=-171.50], qp['Spider'/98, l='MpServer', x=-596.50, y=4.00, z=-271.50], qp['Spider'/99, l='MpServer', x=-593.38, y=4.00, z=-242.19], qc['Creeper'/96, l='MpServer', x=-598.50, y=4.00, z=-287.50], qr['Zombie'/97, l='MpServer', x=-597.50, y=4.00, z=-265.50], qc['Creeper'/110, l='MpServer', x=-572.09, y=4.00, z=-209.78], qc['Creeper'/111, l='MpServer', x=-570.28, y=4.00, z=-180.91], qp['Spider'/108, l='MpServer', x=-581.28, y=4.00, z=-211.22], qr['Zombie'/109, l='MpServer', x=-563.50, y=4.00, z=-254.50], qn['Skeleton'/106, l='MpServer', x=-591.50, y=4.00, z=-247.50], qp['Spider'/107, l='MpServer', x=-585.59, y=4.00, z=-211.53], qp['Spider'/104, l='MpServer', x=-588.50, y=4.00, z=-246.50], qp['Spider'/105, l='MpServer', x=-588.50, y=4.00, z=-240.03], qr['Zombie'/114, l='MpServer', x=-567.01, y=4.00, z=-167.66], qp['Spider'/113, l='MpServer', x=-565.25, y=4.00, z=-175.16], qc['Creeper'/112, l='MpServer', x=-568.50, y=4.00, z=-182.50]]
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(Unknown Source)
-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.6.0_17, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
Memory: 307791808 bytes (293 MB) / 532807680 bytes (508 MB) up to 1065484288 bytes (1016 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 7955 (445480 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: ATI Mobility Radeon HD 4200 Series GL version 3.2.9704 Compatibility Profile Context, ATI Technologies Inc.
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: 858 (48048 bytes; 0 MB) allocated, 14 (784 bytes; 0 MB) used

does it crash when he is playing single player on when hes on a server?

plz post the computer specs

java.lang.IndexOutOfBoundsException: -100
at java.nio.DirectByteBuffer.get(Unknown Source)
at org.lwjgl.input.Keyboard.isKeyDown(Keyboard.java:399)

I'm pretty sure that this means that one of your control key bindings is wrong or duplicate, or you have touch screen support enabled without a touch screen.

He was playing single player. He hit "E" on the keyboard to open his inventory, picked the items he wanted and when he hit "E" again to exit the invintory the screen goes blank.

He uses window xp. He has been playing the pc version since 2/14/13..so for a week it worked fine and then this....

go this link and do as it says, then post the results:http: //www.minecraftforum.net/topic/1383256-advanced-minecraft-error-test/