Minecraft Forums

I am a Mom, not a techy person at all. My boys, 7 and 9 are obsessed with Minecraft and for some reason the game crashes every time they go into any of their worlds and access their inventory. I read some previous posts and searched for %appdata% and was able to access their worlds and followed some steps in deleting some data, that didn't work so I deleted all of their worlds (they weren't too happy with me) and tried re-installing. That didn't work either. So now I am jumping into a forum for the first time ever (so please forgive me if I am doing this wrong) hoping one of the Minecraft experts can help. Here is the text from the error report text file:


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

Time: 1/10/13 7:19 PM
Description: Updating screen events

java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Unknown Source)
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.Buffer.checkIndex(Unknown Source)
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['Max_n_Keldan'/452, l='MpServer', x=125.52, y=58.62, z=260.51]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (164,64,248), Chunk: (at 4,4,8 in 10,15; contains blocks 160,0,240 to 175,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 1123 game time, 1123 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: 88 total; [qr['Zombie'/71, l='MpServer', x=56.50, y=61.00, z=181.50], qr['Zombie'/64, l='MpServer', x=47.50, y=39.00, z=262.50], qn['Skeleton'/76, l='MpServer', x=61.50, y=27.00, z=244.50], pe['Sheep'/78, l='MpServer', x=49.50, y=65.00, z=273.50], qr['Zombie'/79, l='MpServer', x=78.97, y=22.00, z=232.47], qn['Skeleton'/72, l='MpServer', x=57.25, y=44.00, z=225.34], qn['Skeleton'/74, l='MpServer', x=50.31, y=42.00, z=218.88], qn['Skeleton'/75, l='MpServer', x=53.91, y=44.00, z=224.69], px['item.tile.flower'/87, l='MpServer', x=70.66, y=63.13, z=263.97], px['item.tile.flower'/86, l='MpServer', x=69.13, y=63.13, z=265.63], qr['Zombie'/81, l='MpServer', x=59.00, y=33.00, z=239.56], qc['Creeper'/80, l='MpServer', x=82.41, y=47.00, z=225.91], qr['Zombie'/83, l='MpServer', x=64.69, y=32.00, z=247.25], qr['Zombie'/82, l='MpServer', x=67.50, y=32.00, z=250.50], pd['Pig'/93, l='MpServer', x=67.50, y=92.00, z=337.50], pd['Pig'/92, l='MpServer', x=71.50, y=91.00, z=338.50], pd['Pig'/94, l='MpServer', x=69.50, y=91.00, z=339.50], qr['Zombie'/88, l='MpServer', x=76.50, y=47.00, z=302.50], pd['Pig'/91, l='MpServer', x=68.09, y=92.00, z=334.88], qc['Creeper'/90, l='MpServer', x=77.50, y=57.00, z=306.50], qc['Creeper'/103, l='MpServer', x=90.50, y=47.00, z=221.50], qp['Spider'/110, l='MpServer', x=106.78, y=32.00, z=263.53], qd['Enderman'/107, l='MpServer', x=109.69, y=12.00, z=230.69], qn['Skeleton'/105, l='MpServer', x=89.50, y=30.00, z=306.50], qr['Zombie'/117, l='MpServer', x=121.50, y=27.00, z=251.50], ow['Bat'/116, l='MpServer', x=117.60, y=18.83, z=254.91], ow['Bat'/115, l='MpServer', x=124.56, y=17.10, z=207.28], qn['Skeleton'/113, l='MpServer', x=108.50, y=31.00, z=337.50], qn['Skeleton'/112, l='MpServer', x=99.72, y=36.00, z=327.84], ow['Bat'/125, l='MpServer', x=101.14, y=33.09, z=254.30], qr['Zombie'/124, l='MpServer', x=126.50, y=17.00, z=263.50], qn['Skeleton'/123, l='MpServer', x=119.50, y=21.00, z=257.50], ow['Bat'/122, l='MpServer', x=95.36, y=19.90, z=233.40], qn['Skeleton'/121, l='MpServer', x=123.31, y=35.00, z=254.05], qr['Zombie'/139, l='MpServer', x=122.91, y=32.00, z=260.50], qc['Creeper'/141, l='MpServer', x=117.50, y=30.00, z=314.50], pe['Sheep'/140, l='MpServer', x=124.03, y=63.00, z=280.09], qr['Zombie'/143, l='MpServer', x=112.50, y=30.00, z=337.50], ow['Bat'/142, l='MpServer', x=129.81, y=42.10, z=312.03], qp['Spider'/153, l='MpServer', x=128.09, y=17.00, z=262.50], qr['Zombie'/154, l='MpServer', x=130.50, y=18.00, z=274.79], ph['Squid'/156, l='MpServer', x=140.50, y=53.31, z=295.16], ph['Squid'/157, l='MpServer', x=141.06, y=58.84, z=304.25], ph['Squid'/158, l='MpServer', x=135.88, y=58.38, z=312.66], ph['Squid'/159, l='MpServer', x=141.69, y=59.09, z=309.44], qc['Creeper'/145, l='MpServer', x=116.50, y=30.00, z=340.50], ph['Squid'/163, l='MpServer', x=143.41, y=53.31, z=319.31], qn['Skeleton'/204, l='MpServer', x=152.50, y=53.00, z=224.50], qc['Creeper'/8880, l='MpServer', x=77.50, y=38.00, z=273.50], px['item.item.reeds'/250, l='MpServer', x=160.41, y=63.13, z=236.84], px['item.item.reeds'/251, l='MpServer', x=160.31, y=63.13, z=238.78], px['item.item.reeds'/249, l='MpServer', x=161.75, y=63.13, z=236.97], ow['Bat'/307, l='MpServer', x=182.56, y=26.00, z=210.43], qn['Skeleton'/313, l='MpServer', x=189.41, y=25.00, z=333.09], qn['Skeleton'/314, l='MpServer', x=190.50, y=25.00, z=328.50], qn['Skeleton'/334, l='MpServer', x=192.50, y=25.00, z=332.50], qc['Creeper'/332, l='MpServer', x=193.50, y=34.00, z=310.44], qc['Creeper'/333, l='MpServer', x=193.00, y=35.00, z=311.56], pe['Sheep'/330, l='MpServer', x=205.47, y=65.00, z=259.63], qc['Creeper'/331, l='MpServer', x=200.50, y=38.00, z=292.50], pe['Sheep'/328, l='MpServer', x=203.50, y=65.00, z=258.50], pe['Sheep'/329, l='MpServer', x=203.22, y=65.00, z=256.50], ays['Max_n_Keldan'/452, l='MpServer', x=125.52, y=58.62, z=260.51], qn['Skeleton'/8200, l='MpServer', x=55.94, y=14.00, z=234.50], qr['Zombie'/8207, l='MpServer', x=65.50, y=37.00, z=270.50], qc['Creeper'/8212, l='MpServer', x=75.50, y=20.00, z=311.50], qr['Zombie'/8678, l='MpServer', x=115.50, y=27.00, z=246.50], qn['Skeleton'/9244, l='MpServer', x=122.50, y=29.00, z=270.50], qc['Creeper'/9599, l='MpServer', x=85.50, y=30.00, z=306.50], qc['Creeper'/9598, l='MpServer', x=90.50, y=30.00, z=306.50], qc['Creeper'/9596, l='MpServer', x=56.50, y=51.00, z=260.50], qr['Zombie'/9601, l='MpServer', x=97.19, y=30.00, z=308.77], qc['Creeper'/9600, l='MpServer', x=84.50, y=30.00, z=307.50], ow['Bat'/1979, l='MpServer', x=104.54, y=36.61, z=250.56], px['item.tile.flower'/6601, l='MpServer', x=99.81, y=68.13, z=304.06], qc['Creeper'/6978, l='MpServer', x=116.50, y=17.00, z=247.50], qr['Zombie'/6977, l='MpServer', x=115.50, y=17.00, z=255.50], qr['Zombie'/6976, l='MpServer', x=117.50, y=17.00, z=255.50], px['item.item.seeds'/7024, l='MpServer', x=108.19, y=64.13, z=297.87], px['item.tile.flower'/6795, l='MpServer', x=96.35, y=71.95, z=312.18], px['item.item.seeds'/6844, l='MpServer', x=99.51, y=70.13, z=312.01], qn['Skeleton'/7620, l='MpServer', x=132.50, y=42.00, z=312.50], ow['Bat'/7444, l='MpServer', x=187.07, y=20.00, z=325.23], qr['Zombie'/8083, l='MpServer', x=58.50, y=29.00, z=181.50], qc['Creeper'/7967, l='MpServer', x=158.50, y=42.00, z=191.50], qn['Skeleton'/7993, l='MpServer', x=67.50, y=67.00, z=233.50], qn['Skeleton'/7994, l='MpServer', x=70.50, y=67.00, z=231.50], qr['Zombie'/7923, l='MpServer', x=187.50, y=35.00, z=184.50]]
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 (amd64) version 6.1
Java Version: 1.7.0_07, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 334166672 bytes (318 MB) / 511180800 bytes (487 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 2834 (158704 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 2, tcache: 0, allocated: 1, tallocated: 63
LWJGL: 2.4.2
OpenGL: Intel(R) HD Graphics 4000 GL version 3.3.0 - Build 8.15.10.2752, Intel
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: 2929 (164024 bytes; 0 MB) allocated, 18 (1008 bytes; 0 MB) used

Tedsters suggestion to update lwjgl seems like a potential to fix because of this line in the error:
at org.lwjgl.input.Keyboard.isKeyDown(Keyboard.java:399)

Many times this error is caused by keymapping but your minecraft install is not modded.

I very much appreciate your help. I updated Java, got rid of previous versions and I ran the other update that was suggested (lwjgl). Still crashes as soon as we access inventory. We have a new Toshiba Satellite P855-S5200 so I don't think it is our computer. The crash text is as follows:

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 1/11/13 3:22 PM
Description: Updating screen events

java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Unknown Source)
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.Buffer.checkIndex(Unknown Source)
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['Max_n_Keldan'/206, l='MpServer', x=49.50, y=80.62, z=254.50]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (52,64,252), Chunk: (at 4,4,12 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: 501 game time, 501 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: 116 total; [oy['Chicken'/71, l='MpServer', x=-30.50, y=71.00, z=258.50], oy['Chicken'/85, l='MpServer', x=-8.50, y=68.00, z=218.50], oy['Chicken'/84, l='MpServer', x=-9.50, y=68.00, z=218.50], oy['Chicken'/86, l='MpServer', x=-1.09, y=68.00, z=220.46], oy['Chicken'/83, l='MpServer', x=-9.50, y=68.00, z=216.50], oy['Chicken'/110, l='MpServer', x=48.50, y=71.00, z=181.50], oy['Chicken'/111, l='MpServer', x=46.50, y=71.00, z=180.50], oy['Chicken'/109, l='MpServer', x=44.50, y=71.00, z=181.50], px['item.tile.torch'/107, l='MpServer', x=26.00, y=25.13, z=278.00], oy['Chicken'/112, l='MpServer', x=51.42, y=70.00, z=190.44], oy['Chicken'/127, l='MpServer', x=61.84, y=72.00, z=235.12], oy['Chicken'/126, l='MpServer', x=57.69, y=72.00, z=237.47], oy['Chicken'/129, l='MpServer', x=56.67, y=69.00, z=223.47], oy['Chicken'/128, l='MpServer', x=64.50, y=69.00, z=226.50], oy['Chicken'/131, l='MpServer', x=54.47, y=79.00, z=274.59], oy['Chicken'/130, l='MpServer', x=53.46, y=80.00, z=268.80], oy['Chicken'/133, l='MpServer', x=68.47, y=73.00, z=284.36], oy['Chicken'/132, l='MpServer', x=66.31, y=76.00, z=270.47], oy['Chicken'/152, l='MpServer', x=84.47, y=68.00, z=207.44], oy['Chicken'/153, l='MpServer', x=79.53, y=80.00, z=265.35], oy['Chicken'/154, l='MpServer', x=77.75, y=74.00, z=269.91], oy['Chicken'/155, l='MpServer', x=77.34, y=74.00, z=271.44], oy['Chicken'/156, l='MpServer', x=78.38, y=78.00, z=271.79], oy['Chicken'/157, l='MpServer', x=97.50, y=69.00, z=190.50], oy['Chicken'/158, l='MpServer', x=97.50, y=69.00, z=188.50], oy['Chicken'/159, l='MpServer', x=98.50, y=69.00, z=190.50], oy['Chicken'/149, l='MpServer', x=83.50, y=68.00, z=199.50], oy['Chicken'/150, l='MpServer', x=74.59, y=68.00, z=200.47], oy['Chicken'/151, l='MpServer', x=86.44, y=68.00, z=199.33], oy['Chicken'/163, l='MpServer', x=110.50, y=65.00, z=242.50], oy['Chicken'/162, l='MpServer', x=108.50, y=65.00, z=239.50], oy['Chicken'/161, l='MpServer', x=107.50, y=65.00, z=236.50], oy['Chicken'/160, l='MpServer', x=100.50, y=70.00, z=189.50], oy['Chicken'/164, l='MpServer', x=110.50, y=65.00, z=241.50], px['item.tile.rail'/205, l='MpServer', x=37.88, y=22.13, z=301.18], qc['Creeper'/223, l='MpServer', x=-22.50, y=24.00, z=276.50], ow['Bat'/237, l='MpServer', x=38.88, y=27.68, z=312.10], ow['Bat'/234, l='MpServer', x=39.72, y=27.90, z=317.46], ow['Bat'/233, l='MpServer', x=39.69, y=25.62, z=313.88], ow['Bat'/231, l='MpServer', x=33.85, y=24.80, z=316.58], qn['Skeleton'/224, l='MpServer', x=-14.50, y=37.00, z=214.50], qr['Zombie'/252, l='MpServer', x=109.50, y=23.00, z=307.50], px['item.tile.rail'/4553, l='MpServer', x=37.88, y=22.13, z=301.19], ays['Max_n_Keldan'/206, l='MpServer', x=49.50, y=80.62, z=254.50], ow['Bat'/287, l='MpServer', x=77.94, y=39.00, z=329.09], ow['Bat'/286, l='MpServer', x=87.00, y=43.26, z=330.81], qc['Creeper'/258, l='MpServer', x=129.50, y=40.00, z=312.50], ow['Bat'/288, l='MpServer', x=55.44, y=40.89, z=316.44], ow['Bat'/294, l='MpServer', x=54.44, y=23.10, z=332.25], ow['Bat'/295, l='MpServer', x=42.34, y=17.10, z=323.88], ow['Bat'/296, l='MpServer', x=46.57, y=20.29, z=332.91], ow['Bat'/297, l='MpServer', x=55.38, y=19.98, z=337.03], ow['Bat'/298, l='MpServer', x=-4.50, y=26.92, z=234.00], ow['Bat'/299, l='MpServer', x=-7.53, y=22.05, z=213.75], qr['Zombie'/327, l='MpServer', x=57.27, y=35.00, z=283.69], qc['Creeper'/324, l='MpServer', x=29.50, y=34.00, z=301.50], qr['Zombie'/328, l='MpServer', x=56.31, y=35.00, z=282.84], qn['Skeleton'/329, l='MpServer', x=57.54, y=35.00, z=282.46], qc['Creeper'/383, l='MpServer', x=34.50, y=15.00, z=253.50], ow['Bat'/365, l='MpServer', x=89.63, y=50.02, z=314.19], ow['Bat'/366, l='MpServer', x=41.22, y=49.39, z=326.75], ow['Bat'/361, l='MpServer', x=75.92, y=50.29, z=307.58], ow['Bat'/363, l='MpServer', x=84.39, y=50.03, z=308.03], qn['Skeleton'/409, l='MpServer', x=104.50, y=47.00, z=208.50], qn['Skeleton'/435, l='MpServer', x=35.50, y=12.00, z=323.50], px['item.tile.gravel'/2347, l='MpServer', x=1.41, y=21.13, z=309.87], qr['Zombie'/436, l='MpServer', x=31.31, y=12.00, z=325.54], qr['Zombie'/437, l='MpServer', x=35.01, y=13.00, z=322.53], qr['Zombie'/438, l='MpServer', x=27.50, y=12.00, z=327.50], qn['Skeleton'/439, l='MpServer', x=-21.50, y=28.00, z=243.50], qc['Creeper'/510, l='MpServer', x=-29.50, y=33.00, z=198.50], qc['Creeper'/511, l='MpServer', x=-29.32, y=33.00, z=195.72], qn['Skeleton'/500, l='MpServer', x=75.50, y=56.00, z=300.50], qd['Enderman'/501, l='MpServer', x=74.25, y=56.00, z=301.25], qp['Spider'/497, l='MpServer', x=41.50, y=15.00, z=288.00], qn['Skeleton'/499, l='MpServer', x=45.91, y=13.00, z=288.50], qc['Creeper'/550, l='MpServer', x=117.50, y=21.00, z=332.50], qr['Zombie'/512, l='MpServer', x=-27.50, y=33.00, z=200.50], qr['Zombie'/513, l='MpServer', x=-29.50, y=33.00, z=201.50], qr['Zombie'/609, l='MpServer', x=52.50, y=47.00, z=334.50], qc['Creeper'/612, l='MpServer', x=-13.50, y=46.00, z=209.50], qn['Skeleton'/623, l='MpServer', x=55.50, y=42.00, z=318.50], qr['Zombie'/625, l='MpServer', x=53.50, y=42.00, z=317.50], qn['Skeleton'/624, l='MpServer', x=44.69, y=40.00, z=320.02], qn['Skeleton'/696, l='MpServer', x=88.50, y=19.00, z=267.50], qn['Skeleton'/695, l='MpServer', x=90.50, y=19.00, z=267.50], px['item.tile.rail'/8426, l='MpServer', x=2.09, y=19.13, z=285.31], qr['Zombie'/658, l='MpServer', x=-28.04, y=33.00, z=198.44], qn['Skeleton'/659, l='MpServer', x=-25.50, y=35.00, z=190.50], qn['Skeleton'/762, l='MpServer', x=-3.50, y=20.00, z=318.50], qn['Skeleton'/760, l='MpServer', x=-6.50, y=20.00, z=315.50], qn['Skeleton'/766, l='MpServer', x=-4.50, y=20.00, z=310.50], qn['Skeleton'/759, l='MpServer', x=-8.50, y=20.00, z=315.50], qn['Skeleton'/731, l='MpServer', x=-8.50, y=36.00, z=239.50], qn['Skeleton'/732, l='MpServer', x=-10.50, y=36.00, z=239.50], qn['Skeleton'/733, l='MpServer', x=-11.50, y=36.00, z=239.50], qc['Creeper'/817, l='MpServer', x=0.50, y=27.00, z=232.01], qc['Creeper'/816, l='MpServer', x=-4.45, y=22.00, z=218.05], qc['Creeper'/815, l='MpServer', x=-10.06, y=25.00, z=215.50], px['item.tile.gravel'/2993, l='MpServer', x=40.47, y=26.13, z=278.16], qc['Creeper'/868, l='MpServer', x=-1.50, y=26.00, z=323.50], qn['Skeleton'/870, l='MpServer', x=-1.50, y=38.00, z=211.50], qr['Zombie'/872, l='MpServer', x=0.96, y=38.00, z=218.41], qc['Creeper'/843, l='MpServer', x=32.78, y=22.00, z=315.91], qc['Creeper'/840, l='MpServer', x=44.00, y=37.00, z=298.50], qn['Skeleton'/841, l='MpServer', x=38.50, y=35.00, z=296.50], qr['Zombie'/846, l='MpServer', x=25.41, y=26.00, z=320.63], qn['Skeleton'/844, l='MpServer', x=31.50, y=26.00, z=324.50], qr['Zombie'/845, l='MpServer', x=27.50, y=26.00, z=322.50], px['item.tile.rail'/6681, l='MpServer', x=37.88, y=22.13, z=296.81], qc['Creeper'/911, l='MpServer', x=64.50, y=43.00, z=330.50], qd['Enderman'/8581, l='MpServer', x=-28.50, y=26.00, z=242.85], qd['Enderman'/8580, l='MpServer', x=-28.50, y=26.00, z=244.50], qd['Enderman'/8582, l='MpServer', x=-30.50, y=26.00, z=242.50], px['item.tile.gravel'/8184, l='MpServer', x=39.09, y=26.13, z=278.81], px['item.tile.rail'/7771, l='MpServer', x=36.03, y=22.13, z=305.19]]
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 (amd64) version 6.1
Java Version: 1.7.0_07, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 284044224 bytes (270 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 11747 (657832 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
LWJGL: 2.8.4
OpenGL: Intel(R) HD Graphics 4000 GL version 3.3.0 - Build 8.15.10.2752, Intel
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: 3997 (223832 bytes; 0 MB) allocated, 16 (896 bytes; 0 MB) used

Okay I have a few ideas/possibilities for the cause of your issue. I suspect this could be a windows permissions/security related issue.

Try right clicking the minecraft launcher and telling it to run as administrator. This may not solve the issue until you do another clean install. Do a clean install by deleting or renaming the .minecraft folder then use the launcher to install a fresh copy.

If that doesn't help then try to put exceptions in your firewall and antivirus for minecraft.exe and javaw.exe
What are you using for an antivirus by the way?

Another idea that just popped into my head...do you have any monitoring software running on the machine?

[edit]
I'm getting desperate and grasping at straws as you can see. haha

This has happened to me too (I'm on a mac)

---- Minecraft Crash Report ----
// Hey, that tickles! Hehehe!

Time: 1/14/13 10:30 PM
Description: Unexpected error

java.lang.VerifyError: (class: avz, method: a signature: (Latb;)V) Incompatible argument to function
at net.minecraft.client.Minecraft.l(SourceFile:1273)
at net.minecraft.client.Minecraft.J(SourceFile:582)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Thread.java:680)


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

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [ays['reivax3685'/7038586, l='MpServer', x=-573.67, y=65.62, z=865.09]]
Chunk stats: MultiplayerChunkCache: 169
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-28,64,36), Chunk: (at 4,4,4 in -2,2; contains blocks -32,0,32 to -17,255,47), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 498133530 game time, 498162555 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: 199 total; [ays['reivax3685'/7038586, l='MpServer', x=-573.67, y=65.62, z=865.09], qu['Villager'/7038588, l='MpServer', x=-580.21, y=64.00, z=904.02], pv['Boat'/7038587, l='MpServer', x=-577.00, y=58.58, z=900.84], mg['Painting'/7038686, l='MpServer', x=-583.50, y=68.50, z=853.06], mg['Painting'/7038685, l='MpServer', x=-580.50, y=68.50, z=853.06], mg['Painting'/7038693, l='MpServer', x=-571.94, y=58.50, z=845.00], pe['Sheep'/7038708, l='MpServer', x=-568.48, y=64.00, z=846.26], pe['Sheep'/7038709, l='MpServer', x=-567.43, y=64.00, z=846.38], oy['Chicken'/7038710, l='MpServer', x=-569.22, y=64.00, z=846.22], oy['Chicken'/7038711, l='MpServer', x=-563.81, y=64.00, z=847.22], oz['Cow'/7038704, l='MpServer', x=-562.74, y=64.00, z=846.93], pe['Sheep'/7038705, l='MpServer', x=-564.26, y=64.00, z=845.07], oz['Cow'/7038706, l='MpServer', x=-566.28, y=64.00, z=845.08], oz['Cow'/7038707, l='MpServer', x=-561.58, y=64.00, z=846.08], oy['Chicken'/7038716, l='MpServer', x=-566.31, y=64.00, z=847.22], pe['Sheep'/7038717, l='MpServer', x=-562.90, y=64.00, z=845.07], oz['Cow'/7038718, l='MpServer', x=-562.15, y=64.00, z=845.07], oy['Chicken'/7038719, l='MpServer', x=-568.43, y=64.00, z=847.22], pe['Sheep'/7038712, l='MpServer', x=-563.90, y=64.00, z=846.40], pe['Sheep'/7038713, l='MpServer', x=-566.21, y=64.00, z=846.29], oy['Chicken'/7038714, l='MpServer', x=-568.84, y=64.00, z=847.22], oy['Chicken'/7038715, l='MpServer', x=-569.22, y=64.00, z=846.78], mg['Painting'/7038693, l='MpServer', x=-571.94, y=58.50, z=845.00], oy['Chicken'/7038692, l='MpServer', x=-649.56, y=62.00, z=922.56], oz['Cow'/7038695, l='MpServer', x=-567.40, y=64.00, z=845.08], pe['Sheep'/7038694, l='MpServer', x=-562.76, y=64.00, z=846.22], pk['Wolf'/7038688, l='MpServer', x=-598.44, y=63.00, z=860.72], oy['Chicken'/7038691, l='MpServer', x=-647.53, y=62.00, z=923.36], qu['Villager'/7038690, l='MpServer', x=-546.47, y=41.00, z=941.38], oy['Chicken'/7038701, l='MpServer', x=-565.19, y=64.00, z=847.22], oz['Cow'/7038700, l='MpServer', x=-565.07, y=64.00, z=846.24], oy['Chicken'/7038703, l='MpServer', x=-568.31, y=64.00, z=847.22], pe['Sheep'/7038702, l='MpServer', x=-567.13, y=64.00, z=845.13], pe['Sheep'/7038697, l='MpServer', x=-564.89, y=64.00, z=845.11], oz['Cow'/7038696, l='MpServer', x=-565.04, y=64.00, z=846.93], pe['Sheep'/7038699, l='MpServer', x=-566.19, y=64.00, z=845.08], pe['Sheep'/7038698, l='MpServer', x=-560.10, y=64.00, z=846.93], pe['Sheep'/7038678, l='MpServer', x=-558.62, y=109.00, z=936.07], pe['Sheep'/7038679, l='MpServer', x=-557.38, y=71.00, z=937.28], pe['Sheep'/7038677, l='MpServer', x=-556.95, y=87.00, z=936.09], oz['Cow'/7038674, l='MpServer', x=-547.68, y=64.00, z=940.94], pb['Mooshroom'/7038675, l='MpServer', x=-553.88, y=109.00, z=939.23], pb['Mooshroom'/7038672, l='MpServer', x=-551.50, y=109.00, z=937.31], mg['Painting'/7038686, l='MpServer', x=-583.50, y=68.50, z=853.06], pk['Wolf'/7038687, l='MpServer', x=-543.31, y=50.00, z=897.69], qu['Villager'/7038684, l='MpServer', x=-587.30, y=61.00, z=858.54], mg['Painting'/7038685, l='MpServer', x=-580.50, y=68.50, z=853.06], qu['Villager'/7038682, l='MpServer', x=-583.50, y=61.00, z=857.89], qu['Villager'/7038683, l='MpServer', x=-587.97, y=61.00, z=857.46], qu['Villager'/7038680, l='MpServer', x=-583.50, y=60.00, z=858.70], qu['Villager'/7038681, l='MpServer', x=-585.50, y=60.00, z=855.50], qu['Villager'/7038663, l='MpServer', x=-548.50, y=84.00, z=930.50], qu['Villager'/7038662, l='MpServer', x=-549.53, y=64.00, z=928.56], qu['Villager'/7038661, l='MpServer', x=-547.50, y=64.00, z=928.50], qu['Villager'/7038660, l='MpServer', x=-557.50, y=71.00, z=928.50], qu['Villager'/7038659, l='MpServer', x=-556.66, y=64.00, z=934.00], qu['Villager'/7038658, l='MpServer', x=-551.53, y=64.88, z=928.44], qu['Villager'/7038657, l='MpServer', x=-553.56, y=64.00, z=928.44], qu['Villager'/7038656, l='MpServer', x=-555.50, y=71.00, z=928.50], pb['Mooshroom'/7038670, l='MpServer', x=-552.63, y=109.00, z=938.13], oz['Cow'/7038669, l='MpServer', x=-549.93, y=109.00, z=936.45], oz['Cow'/7038668, l='MpServer', x=-548.50, y=87.00, z=936.09], oz['Cow'/7038667, l='MpServer', x=-548.75, y=109.00, z=938.51], pb['Mooshroom'/7038665, l='MpServer', x=-554.63, y=109.00, z=936.56], qu['Villager'/7038664, l='MpServer', x=-550.38, y=84.00, z=930.91], pd['Pig'/7038640, l='MpServer', x=-569.50, y=64.00, z=936.09], pd['Pig'/7038641, l='MpServer', x=-564.91, y=70.00, z=938.09], pe['Sheep'/7038644, l='MpServer', x=-561.61, y=89.00, z=936.04], pe['Sheep'/7038645, l='MpServer', x=-561.34, y=64.00, z=938.81], pe['Sheep'/7038646, l='MpServer', x=-559.55, y=109.00, z=937.92], pe['Sheep'/7038647, l='MpServer', x=-548.74, y=41.00, z=924.73], pe['Sheep'/7038648, l='MpServer', x=-547.72, y=40.00, z=929.53], pe['Sheep'/7038649, l='MpServer', x=-555.50, y=41.00, z=929.66], qu['Villager'/7038650, l='MpServer', x=-558.69, y=64.00, z=934.06], qu['Villager'/7038651, l='MpServer', x=-554.38, y=68.00, z=934.09], qu['Villager'/7038652, l='MpServer', x=-550.63, y=68.00, z=934.16], qu['Villager'/7038653, l='MpServer', x=-548.66, y=64.00, z=934.09], qu['Villager'/7038654, l='MpServer', x=-552.59, y=70.00, z=934.28], qu['Villager'/7038655, l='MpServer', x=-546.38, y=64.00, z=934.22], qu['Villager'/7038625, l='MpServer', x=-559.34, y=64.00, z=919.13], qu['Villager'/7038624, l='MpServer', x=-557.63, y=64.00, z=919.09], qu['Villager'/7038627, l='MpServer', x=-549.59, y=64.00, z=919.28], qu['Villager'/7038626, l='MpServer', x=-547.41, y=69.00, z=919.28], qu['Villager'/7038629, l='MpServer', x=-555.50, y=64.00, z=924.50], qu['Villager'/7038628, l='MpServer', x=-557.44, y=64.00, z=924.44], qu['Villager'/7038631, l='MpServer', x=-549.50, y=64.00, z=924.50], qu['Villager'/7038630, l='MpServer', x=-547.56, y=68.00, z=924.50], qu['Villager'/7038633, l='MpServer', x=-555.38, y=64.00, z=919.13], qu['Villager'/7038632, l='MpServer', x=-545.50, y=71.00, z=919.50], qu['Villager'/7038635, l='MpServer', x=-553.44, y=64.00, z=924.44], qu['Villager'/7038634, l='MpServer', x=-551.44, y=64.00, z=924.44], qu['Villager'/7038637, l='MpServer', x=-560.66, y=64.00, z=934.22], qu['Villager'/7038636, l='MpServer', x=-551.44, y=64.00, z=919.25], pd['Pig'/7038639, l='MpServer', x=-569.09, y=64.00, z=941.45], pd['Pig'/7038638, l='MpServer', x=-567.84, y=109.00, z=936.76], oy['Chicken'/7038610, l='MpServer', x=-582.56, y=61.00, z=933.50], oy['Chicken'/7038611, l='MpServer', x=-584.85, y=61.00, z=930.18], oy['Chicken'/7038608, l='MpServer', x=-584.69, y=61.00, z=931.09], oy['Chicken'/7038609, l='MpServer', x=-584.22, y=61.00, z=932.19], oy['Chicken'/7038614, l='MpServer', x=-582.47, y=61.00, z=930.15], oy['Chicken'/7038615, l='MpServer', x=-584.84, y=61.00, z=933.88], oy['Chicken'/7038612, l='MpServer', x=-584.34, y=61.00, z=930.38], oy['Chicken'/7038613, l='MpServer', x=-581.16, y=61.00, z=930.19], pe['Sheep'/7038618, l='MpServer', x=-547.38, y=40.00, z=916.50], pe['Sheep'/7038619, l='MpServer', x=-555.41, y=40.00, z=918.25], oz['Cow'/7039082, l='MpServer', x=-647.55, y=64.00, z=794.22], qu['Villager'/7038616, l='MpServer', x=-551.47, y=41.00, z=887.50], qu['Villager'/7039083, l='MpServer', x=-543.50, y=64.00, z=785.50], pe['Sheep'/7038617, l='MpServer', x=-546.05, y=40.00, z=925.17], qu['Villager'/7039084, l='MpServer', x=-543.50, y=64.00, z=787.50], pe['Sheep'/7038622, l='MpServer', x=-555.47, y=40.00, z=925.78], qu['Villager'/7039085, l='MpServer', x=-543.50, y=64.00, z=795.50], pe['Sheep'/7038623, l='MpServer', x=-554.38, y=40.00, z=927.88], qu['Villager'/7039086, l='MpServer', x=-543.50, y=64.00, z=797.50], pe['Sheep'/7038620, l='MpServer', x=-546.99, y=40.00, z=926.30], qu['Villager'/7039087, l='MpServer', x=-543.50, y=64.00, z=799.50], pe['Sheep'/7038621, l='MpServer', x=-546.22, y=40.00, z=916.47], qu['Villager'/7038603, l='MpServer', x=-578.38, y=64.00, z=915.22], qu['Villager'/7038602, l='MpServer', x=-581.41, y=64.00, z=915.31], px['item.item.egg'/7038601, l='MpServer', x=-601.56, y=48.13, z=902.13], oy['Chicken'/7038600, l='MpServer', x=-601.38, y=48.00, z=902.22], oy['Chicken'/7038607, l='MpServer', x=-584.13, y=61.00, z=933.22], oy['Chicken'/7038606, l='MpServer', x=-581.16, y=61.00, z=932.72], pk['Wolf'/7038605, l='MpServer', x=-552.41, y=64.00, z=896.53], qu['Villager'/7038604, l='MpServer', x=-583.41, y=64.00, z=915.28], qu['Villager'/7038799, l='MpServer', x=-543.31, y=64.00, z=802.00], mc['entity.ItemFrame.name'/7038788, l='MpServer', x=-510.94, y=64.50, z=925.50], qu['Villager'/7038784, l='MpServer', x=-505.66, y=43.00, z=891.81], qu['Villager'/7038785, l='MpServer', x=-507.20, y=41.00, z=891.66], qu['Villager'/7038786, l='MpServer', x=-506.00, y=64.00, z=923.69], qu['Villager'/7038787, l='MpServer', x=-506.00, y=64.00, z=923.34], qu['Villager'/7038801, l='MpServer', x=-543.50, y=64.00, z=805.50], qu['Villager'/7038800, l='MpServer', x=-543.50, y=64.00, z=803.50], qu['Villager'/7038802, l='MpServer', x=-543.50, y=64.00, z=807.50], qu['Villager'/7038762, l='MpServer', x=-578.93, y=64.00, z=822.30], qu['Villager'/7038763, l='MpServer', x=-581.66, y=64.00, z=823.34], qu['Villager'/7038760, l='MpServer', x=-580.93, y=64.00, z=826.70], qu['Villager'/7038761, l='MpServer', x=-581.70, y=64.00, z=824.93], qu['Villager'/7038766, l='MpServer', x=-580.07, y=64.00, z=822.31], qu['Villager'/7038767, l='MpServer', x=-579.30, y=64.00, z=824.07], qu['Villager'/7038764, l='MpServer', x=-579.70, y=64.00, z=824.07], qu['Villager'/7038765, l='MpServer', x=-579.30, y=64.00, z=824.07], qu['Villager'/7038754, l='MpServer', x=-577.05, y=64.00, z=826.27], qu['Villager'/7038755, l='MpServer', x=-578.07, y=64.00, z=825.30], qu['Villager'/7038752, l='MpServer', x=-577.09, y=64.00, z=825.27], qu['Villager'/7038753, l='MpServer', x=-576.33, y=64.00, z=825.89], qu['Villager'/7038758, l='MpServer', x=-581.70, y=64.00, z=826.01], qu['Villager'/7038759, l='MpServer', x=-580.93, y=64.00, z=825.91], qu['Villager'/7038756, l='MpServer', x=-577.40, y=64.00, z=827.07],
qu['Villager'/7038757, l='MpServer', x=-580.93, y=64.00, z=826.70], qu['Villager'/7038779, l='MpServer', x=-577.30, y=64.00, z=822.30], qu['Villager'/7038778, l='MpServer', x=-578.03, y=64.00, z=822.31], qu['Villager'/7038777, l='MpServer', x=-576.93, y=64.00, z=823.30], qu['Villager'/7038776, l='MpServer', x=-578.07, y=64.00, z=823.39], oy['Chicken'/7038783, l='MpServer', x=-585.66, y=64.00, z=830.47], qu['Villager'/7038782, l='MpServer', x=-581.66, y=64.00, z=823.34], qu['Villager'/7038781, l='MpServer', x=-581.66, y=64.00, z=823.34], qu['Villager'/7038780, l='MpServer', x=-581.66, y=64.00, z=823.34], qu['Villager'/7038771, l='MpServer', x=-580.06, y=64.00, z=823.17], qu['Villager'/7038770, l='MpServer', x=-579.72, y=64.00, z=822.30], qu['Villager'/7038769, l='MpServer', x=-579.67, y=64.00, z=822.30], qu['Villager'/7038768, l='MpServer', x=-578.93, y=64.00, z=823.37], qu['Villager'/7038775, l='MpServer', x=-578.07, y=64.00, z=825.30], qu['Villager'/7038774, l='MpServer', x=-577.30, y=64.00, z=826.90], qu['Villager'/7038773, l='MpServer', x=-579.30, y=64.00, z=824.07], qu['Villager'/7038772, l='MpServer', x=-578.93, y=64.00, z=822.30], pe['Sheep'/7038728, l='MpServer', x=-568.55, y=64.00, z=845.07], qu['Villager'/7038729, l='MpServer', x=-513.97, y=64.00, z=923.34], qu['Villager'/7038730, l='MpServer', x=-513.97, y=64.00, z=923.69], oy['Chicken'/7038731, l='MpServer', x=-557.78, y=64.00, z=846.52], oy['Chicken'/7038732, l='MpServer', x=-557.78, y=64.00, z=845.65], pe['Sheep'/7038733, l='MpServer', x=-558.46, y=64.00, z=846.92], pe['Sheep'/7038734, l='MpServer', x=-558.45, y=64.00, z=845.07], oy['Chicken'/7038735, l='MpServer', x=-559.47, y=63.00, z=847.22], pe['Sheep'/7038720, l='MpServer', x=-568.55, y=64.00, z=845.07], oy['Chicken'/7038721, l='MpServer', x=-566.32, y=64.00, z=847.22], pe['Sheep'/7038722, l='MpServer', x=-563.87, y=64.00, z=846.13], pe['Sheep'/7038723, l='MpServer', x=-561.59, y=64.00, z=846.93], oy['Chicken'/7038724, l='MpServer', x=-564.26, y=64.00, z=847.22], oz['Cow'/7038725, l='MpServer', x=-568.55, y=64.00, z=845.07], oy['Chicken'/7038726, l='MpServer', x=-567.35, y=64.00, z=847.22], oz['Cow'/7038727, l='MpServer', x=-560.73, y=64.00, z=845.07], qu['Villager'/7038745, l='MpServer', x=-580.07, y=64.00, z=822.69], qu['Villager'/7038744, l='MpServer', x=-579.30, y=64.00, z=824.07], qu['Villager'/7038747, l='MpServer', x=-578.93, y=64.00, z=823.22], qu['Villager'/7038746, l='MpServer', x=-579.70, y=64.00, z=824.07], qu['Villager'/7038749, l='MpServer', x=-580.93, y=64.00, z=825.30], qu['Villager'/7038748, l='MpServer', x=-581.70, y=64.00, z=826.70], qu['Villager'/7038751, l='MpServer', x=-578.07, y=64.00, z=826.24], qu['Villager'/7038750, l='MpServer', x=-576.30, y=64.00, z=826.70], oz['Cow'/7038737, l='MpServer', x=-559.44, y=64.00, z=845.07], oz['Cow'/7038736, l='MpServer', x=-558.34, y=64.00, z=846.93], qu['Villager'/7038739, l='MpServer', x=-580.07, y=64.00, z=823.11], oz['Cow'/7038738, l='MpServer', x=-559.64, y=64.00, z=846.17], qu['Villager'/7038741, l='MpServer', x=-578.93, y=64.00, z=822.89], qu['Villager'/7038740, l='MpServer', x=-580.94, y=64.00, z=823.34], qu['Villager'/7038743, l='MpServer', x=-576.93, y=64.00, z=823.34], qu['Villager'/7038742, l='MpServer', x=-577.70, y=64.00, z=824.07], qu['Villager'/7039256, l='MpServer', x=-543.50, y=64.00, z=783.50]]
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:548)
at java.lang.Thread.run(Thread.java:680)

-- System Details --
Details:
Minecraft Version: 1.4.7
Operating System: Mac OS X (x86_64) version 10.7.5
Java Version: 1.6.0_37, Apple Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Apple Inc.
Memory: 472403056 bytes (450 MB) / 581435392 bytes (554 MB) up to 1065025536 bytes (1015 MB)
JVM Flags: 3 total; -Xbootclasspath/a:/System/Library/PrivateFrameworks/JavaApplicationLauncher.framework/Resources/LauncherSupport.jar -Xms512M -Xmx1024M
AABB Pool Size: 25273 (1415288 bytes; 1 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
LWJGL: 2.4.2
OpenGL: ATI Radeon HD 6750M OpenGL Engine GL version 2.1 ATI-7.32.12, 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: 4746 (265776 bytes; 0 MB) allocated, 12 (672 bytes; 0 MB) used

I did what RodaBon suggested and it worked.

I deleted the entire ".minecraft" folder and re-installed it. Worked great. But again, by this time I had uninstalled Java and installed the most recent version and I had updated the "lwjgl" too. The boys lost all of their worlds (I had tried to keep the saved world data in previous attempts but the crash continued to happen). The total clean install seemed to be the key.

I really appreciate everyone's help with this.