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I have a Windows XP operating system, recently updated. When I load Minecraft with the following mods, it continues to crash when I load up a world. I checked with Magic Launcher and it says that all the mods are compatible. My computer is fine running Minecraft usually.

Mods:
-Mod Loader
-Audiotori
-Mob Amputation
-Mob Dismemberment
-Optifine
-Single Player Commands
-TooManyItems
-Rei Minimap
-Almost Peaceful
All mods are updated to or compatible with 1.4.6

I've gotten a similar crash report before, running the same mods excluding Single Player Commands (but it was on a custom map)

Crash report:


---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 12/25/12 4:23 PM
Description: Rendering entity in world

java.lang.IllegalAccessError: tried to access field bcc.k from class gb_RenderZombie
at gb_RenderZombie.a(gb_RenderZombie.java:67)
at bcj.a(SourceFile:84)
at bcc.a(SourceFile:119)
at bdd.a(SourceFile:44)
at bdd.a(SourceFile:6)
at bbu.a(RenderManager.java:221)
at bbu.a(RenderManager.java:190)
at bav.a(RenderGlobal.java:475)
at ban.a(EntityRenderer.java:1584)
at ban.b(EntityRenderer.java:1120)
at EntityRendererProxy.b(EntityRendererProxy.java:20)
at net.minecraft.client.Minecraft.J(SourceFile:605)
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 gb_RenderZombie.a(gb_RenderZombie.java:67)
at bcj.a(SourceFile:84)
at bcc.a(SourceFile:119)
at bdd.a(SourceFile:44)
at bdd.a(SourceFile:6)

-- Entity being rendered --
Details:
Entity Type: Zombie (qr)
Entity ID: 1662
Name: Zombie
Exact location: 246.51, 46.43, 271.59
Block location: World: (246,46,271), Chunk: (at 6,2,15 in 15,16; contains blocks 240,0,256 to 255,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Momentum: 0.00, -0.30, 0.00

-- Renderer details --
Details:
Assigned renderer: [email protected]
Location: 26.43,-19.86,31.10 - World: (26,-20,31), Chunk: (at 10,-2,15 in 1,1; contains blocks 16,0,16 to 31,255,31), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Rotation: -44.0625
Delta: 0.35979223
Stacktrace:
at bbu.a(RenderManager.java:221)
at bbu.a(RenderManager.java:190)
at bav.a(RenderGlobal.java:475)
at ban.a(EntityRenderer.java:1584)
at ban.b(EntityRenderer.java:1120)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [ays['TheAntiVentus'/167, l='MpServer', x=220.50, y=66.09, z=240.50]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (224,64,232), Chunk: (at 0,4,8 in 14,14; contains blocks 224,0,224 to 239,255,239), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 165 game time, 165 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: 243 total; [pw['Falling Block'/4400, l='MpServer', x=306.50, y=26.42, z=290.50], pw['Falling Block'/4401, l='MpServer', x=303.50, y=27.42, z=291.50], pw['Falling Block'/4402, l='MpServer', x=304.50, y=27.42, z=292.50], pw['Falling Block'/4403, l='MpServer', x=305.50, y=27.42, z=292.50], pw['Falling Block'/4404, l='MpServer', x=306.50, y=26.42, z=291.50], pw['Falling Block'/4405, l='MpServer', x=303.50, y=27.42, z=292.50], pw['Falling Block'/4406, l='MpServer', x=306.50, y=26.42, z=292.50], pw['Falling Block'/4407, l='MpServer', x=304.50, y=27.42, z=293.50], qp['Spider'/1099, l='MpServer', x=256.50, y=42.00, z=304.50], pw['Falling Block'/4408, l='MpServer', x=305.50, y=26.42, z=293.50], ow['Bat'/558, l='MpServer', x=245.88, y=32.30, z=242.75], pw['Falling Block'/4409, l='MpServer', x=303.50, y=27.42, z=293.50], ow['Bat'/559, l='MpServer', x=238.25, y=32.00, z=236.25], pw['Falling Block'/4410, l='MpServer', x=304.50, y=26.42, z=294.50], pw['Falling Block'/4411, l='MpServer', x=303.50, y=27.42, z=294.50], qn['Skeleton'/1663, l='MpServer', x=244.43, y=47.00, z=271.50], qr['Zombie'/1662, l='MpServer', x=246.51, y=46.43, z=271.59], qr['Zombie'/1661, l='MpServer', x=241.37, y=46.59, z=268.48], pw['Falling Block'/4397, l='MpServer', x=304.50, y=27.42, z=291.50], oz['Cow'/29, l='MpServer', x=142.22, y=63.00, z=163.22], pw['Falling Block'/4396, l='MpServer', x=304.50, y=25.42, z=290.50], oz['Cow'/28, l='MpServer', x=143.50, y=63.00, z=165.78], pw['Falling Block'/4399, l='MpServer', x=305.50, y=26.42, z=291.50], oz['Cow'/31, l='MpServer', x=146.50, y=63.00, z=164.50], pw['Falling Block'/4398, l='MpServer', x=305.50, y=26.42, z=290.50], oz['Cow'/30, l='MpServer', x=143.81, y=63.00, z=164.50], qr['Zombie'/1130, l='MpServer', x=264.35, y=39.00, z=247.86], oz['Cow'/38, l='MpServer', x=166.53, y=68.00, z=182.53], oz['Cow'/39, l='MpServer', x=165.06, y=69.00, z=180.56], oz['Cow'/36, l='MpServer', x=166.53, y=68.00, z=184.09], oz['Cow'/37, l='MpServer', x=164.97, y=68.00, z=182.53], qn['Skeleton'/1151, l='MpServer', x=250.50, y=44.00, z=274.50], pe['Sheep'/48, l='MpServer', x=194.50, y=86.00, z=161.50], pe['Sheep'/54, l='MpServer', x=194.50, y=64.00, z=294.50], pe['Sheep'/53, l='MpServer', x=195.50, y=63.00, z=290.50], pe['Sheep'/52, l='MpServer', x=196.50, y=63.00, z=287.50], px['item.item.stick'/63, l='MpServer', x=224.03, y=72.13, z=233.22], px['item.tile.wood.oak'/68, l='MpServer', x=224.15, y=71.13, z=236.42], qp['Spider'/1033, l='MpServer', x=243.90, y=35.00, z=258.58], px['item.item.pickaxeStone'/69, l='MpServer', x=224.06, y=69.13, z=240.00], px['item.tile.log.oak'/70, l='MpServer', x=224.19, y=71.13, z=235.59], qp['Spider'/1035, l='MpServer', x=240.50, y=35.00, z=260.50], px['item.item.hatchetWood'/71, l='MpServer', x=224.38, y=71.13, z=233.81], px['item.item.pickaxeStone'/64, l='MpServer', x=224.18, y=71.13, z=235.89], px['item.item.pickaxeWood'/65, l='MpServer', x=224.19, y=71.13, z=234.72], px['item.item.hatchetStone'/66, l='MpServer', x=225.03, y=71.13, z=233.78], px['item.tile.wood.oak'/67, l='MpServer', x=224.03, y=72.13, z=233.97], pe['Sheep'/85, l='MpServer', x=238.50, y=70.00, z=218.47], pe['Sheep'/84, l='MpServer', x=237.28, y=71.00, z=219.47], pe['Sheep'/87, l='MpServer', x=259.50, y=70.00, z=213.50], pe['Sheep'/86, l='MpServer', x=259.50, y=70.00, z=215.50], pw['Falling Block'/4449, l='MpServer', x=298.50, y=28.42, z=334.50], pe['Sheep'/81, l='MpServer', x=244.50, y=69.00, z=211.50], pe['Sheep'/80, l='MpServer', x=246.50, y=70.00, z=213.50], pe['Sheep'/83, l='MpServer', x=242.51, y=71.02, z=222.50], pe['Sheep'/82, l='MpServer', x=238.50, y=69.00, z=219.53], pe['Sheep'/95, l='MpServer', x=280.47, y=64.00, z=275.47], pe['Sheep'/94, l='MpServer', x=281.50, y=63.00, z=276.53], pe['Sheep'/89, l='MpServer', x=259.50, y=70.00, z=209.50], pe['Sheep'/88, l='MpServer', x=261.50, y=70.00, z=212.50], pe['Sheep'/96, l='MpServer', x=280.50, y=63.00, z=273.50], pe['Sheep'/97, l='MpServer', x=282.53, y=64.00, z=275.47], pe['Sheep'/110, l='MpServer', x=300.50, y=65.00, z=241.50], pe['Sheep'/111, l='MpServer', x=300.53, y=65.00, z=238.50], ow['Bat'/593, l='MpServer', x=223.34, y=18.11, z=254.01], pe['Sheep'/118, l='MpServer', x=300.50, y=64.00, z=296.50], pe['Sheep'/113, l='MpServer', x=299.50, y=64.00, z=236.50], pe['Sheep'/112, l='MpServer', x=299.47, y=65.00, z=238.50], oz['Cow'/126, l='MpServer', x=299.47, y=63.00, z=298.47], pe['Sheep'/121, l='MpServer', x=299.47, y=63.00, z=298.47], pe['Sheep'/120, l='MpServer', x=297.50, y=63.00, z=296.50], qd['Enderman'/1217, l='MpServer', x=283.50, y=16.00, z=240.50], oz['Cow'/128, l='MpServer', x=300.53, y=64.00, z=299.53], ow['Bat'/673, l='MpServer', x=158.94, y=20.57, z=177.97], qc['Creeper'/1778, l='MpServer', x=238.50, y=30.00, z=275.50], qn['Skeleton'/1783, l='MpServer', x=253.50, y=43.00, z=250.50], qn['Skeleton'/1784, l='MpServer', x=252.41, y=44.00, z=246.00], qn['Skeleton'/1255, l='MpServer', x=277.63, y=20.00, z=279.88], qn['Skeleton'/1254, l='MpServer', x=276.66, y=20.00, z=279.00], ays['TheAntiVentus'/167, l='MpServer', x=220.50, y=66.09, z=240.50], ow['Bat'/671, l='MpServer', x=155.86, y=20.64, z=172.77], qc['Creeper'/1755, l='MpServer', x=145.50, y=15.00, z=173.50], qc['Creeper'/1756, l='MpServer', x=145.50, y=15.00, z=174.50], qc['Creeper'/1757, l='MpServer', x=144.50, y=15.00, z=173.50], qr['Zombie'/181, l='MpServer', x=248.50, y=28.00, z=262.50], qn['Skeleton'/1152, l='MpServer', x=247.31, y=42.59, z=275.35], ph['Squid'/220, l='MpServer', x=216.59, y=59.38, z=299.75], ph['Squid'/221, l='MpServer', x=248.88, y=59.38, z=284.22], ph['Squid'/222, l='MpServer', x=252.44, y=59.38, z=288.53], ph['Squid'/223, l='MpServer', x=248.90, y=55.74, z=279.85], ph['Squid'/217, l='MpServer', x=216.50, y=58.38, z=299.75], ph['Squid'/218, l='MpServer', x=216.47, y=59.38, z=292.22], ph['Squid'/219, l='MpServer', x=213.56, y=56.00, z=287.63], qc['Creeper'/1721, l='MpServer', x=237.50, y=32.00, z=244.50], qn['Skeleton'/239, l='MpServer', x=267.50, y=41.00, z=227.50], qn['Skeleton'/237, l='MpServer', x=276.50, y=41.00, z=228.50], pw['Falling Block'/3608, l='MpServer', x=306.50, y=17.42, z=183.50], pw['Falling Block'/3607, l='MpServer', x=305.50, y=17.42, z=183.50], ow['Bat'/706, l='MpServer', x=194.03, y=42.11, z=205.84], ph['Squid'/224, l='MpServer', x=254.47, y=59.34, z=283.16], ow['Bat'/247, l='MpServer', x=282.15, y=16.28, z=262.77], ow['Bat'/723, l='MpServer', x=256.79, y=43.07, z=258.29], ow['Bat'/724, l='MpServer', x=258.66, y=44.84, z=257.00], qr['Zombie'/1373, l='MpServer', x=276.50, y=16.00, z=244.50], qr['Zombie'/1372, l='MpServer', x=274.50, y=16.00, z=246.50], pw['Falling Block'/3004, l='MpServer', x=287.50, y=27.30, z=127.50], ow['Bat'/1358, l='MpServer', x=269.29, y=42.62, z=258.19], pw['Falling Block'/3005, l='MpServer', x=288.50, y=27.30, z=128.50], pw['Falling Block'/3006, l='MpServer', x=287.50, y=27.30, z=128.50], pw['Falling Block'/3000, l='MpServer', x=289.50, y=26.30, z=127.50], pw['Falling Block'/3001, l='MpServer', x=289.50, y=27.30, z=128.50], qc['Creeper'/263, l='MpServer', x=141.50, y=30.00, z=170.50], pw['Falling Block'/3003, l='MpServer', x=287.50, y=27.30, z=126.50], pw['Falling Block'/3550, l='MpServer', x=304.50, y=22.42, z=129.50], pw['Falling Block'/2996, l='MpServer', x=288.50, y=26.30, z=125.50], pw['Falling Block'/3551, l='MpServer', x=303.50, y=22.42, z=131.50], pw['Falling Block'/2998, l='MpServer', x=288.50, y=27.30, z=127.50], pw['Falling Block'/3549, l='MpServer', x=303.50, y=22.42, z=130.50], pw['Falling Block'/2999, l='MpServer', x=289.50, y=26.30, z=125.50], pw['Falling Block'/2993, l='MpServer', x=289.50, y=26.30, z=126.50], pw['Falling Block'/2994, l='MpServer', x=290.50, y=26.30, z=126.50], pw['Falling Block'/2995, l='MpServer', x=290.50, y=27.30, z=127.50], pw['Falling Block'/3557, l='MpServer', x=300.50, y=38.42, z=128.50], pw['Falling Block'/2959, l='MpServer', x=291.50, y=65.30, z=100.50], pw['Falling Block'/3556, l='MpServer', x=300.50, y=38.42, z=127.50], pw['Falling Block'/3559, l='MpServer', x=302.50, y=38.42, z=127.50], pw['Falling Block'/2957, l='MpServer', x=281.50, y=26.30, z=103.50], pw['Falling Block'/3558, l='MpServer', x=301.50, y=38.42, z=128.50], pw['Falling Block'/3553, l='MpServer', x=301.50, y=22.42, z=133.50], pw['Falling Block'/3552, l='MpServer', x=302.50, y=22.42, z=132.50], pw['Falling Block'/3555, l='MpServer', x=301.50, y=38.42, z=127.50], pw['Falling Block'/3554, l='MpServer', x=301.50, y=22.42, z=134.50], pw['Falling Block'/3565, l='MpServer', x=299.50, y=37.42, z=130.50], pw['Falling Block'/3564, l='MpServer', x=301.50, y=38.42, z=129.50], pw['Falling Block'/3567, l='MpServer', x=298.50, y=37.42, z=129.50], pw['Falling Block'/3566, l='MpServer', x=301.50, y=37.42, z=130.50], pw['Falling Block'/3561, l='MpServer', x=299.50, y=37.42, z=129.50], pw['Falling Block'/3560, l='MpServer', x=299.50, y=37.42, z=128.50], pw['Falling Block'/3563, l='MpServer', x=300.50, y=37.42, z=130.50], pw['Falling Block'/3562, l='MpServer', x=300.50, y=37.42, z=129.50], pw['Falling Block'/3572, l='MpServer', x=300.50, y=37.42, z=131.50], pw['Falling Block'/3573, l='MpServer', x=301.50, y=37.42, z=131.50], pw['Falling Block'/3574, l='MpServer', x=302.50, y=38.42, z=129.50], pw['Falling Block'/3575, l='MpServer', x=298.50, y=37.42, z=131.50], pw['Falling Block'/3568, l='MpServer', x=298.50, y=37.42, z=128.50], pw['Falling Block'/3569, l='MpServer', x=298.50, y=37.42, z=130.50], pw['Falling Block'/3570, l='MpServer', x=299.50, y=37.42, z=131.50], pw['Falling Block'/3571, l='MpServer', x=299.50, y=38.42, z=127.50], pw['Falling Block'/3580, l='MpServer', x=298.50, y=37.42, z=133.50], pw['Falling Block'/2964, l='MpServer', x=290.50, y=11.78, z=98.50], pw['Falling Block'/3576, l='MpServer', x=298.50, y=37.42, z=132.50], pw['Falling Block'/2962, l='MpServer', x=292.50, y=67.30, z=102.50], pw['Falling Block'/3577, l='MpServer', x=299.50, y=37.42, z=132.50], pw['Falling Block'/2963, l='MpServer', x=289.50, y=11.78, z=97.50], p
w['Falling Block'/3578, l='MpServer', x=297.50, y=37.42, z=132.50], pw['Falling Block'/2960, l='MpServer', x=292.50, y=63.30, z=100.50], qc['Creeper'/1378, l='MpServer', x=282.50, y=16.00, z=239.50], pw['Falling Block'/3579, l='MpServer', x=297.50, y=37.42, z=131.50], pw['Falling Block'/2961, l='MpServer', x=292.50, y=66.30, z=101.50], pw['Falling Block'/3053, l='MpServer', x=288.50, y=22.30, z=279.50], pw['Falling Block'/3055, l='MpServer', x=287.50, y=22.30, z=279.50], pw['Falling Block'/3041, l='MpServer', x=287.50, y=50.30, z=231.50], pw['Falling Block'/3040, l='MpServer', x=289.50, y=50.30, z=232.50], pw['Falling Block'/3043, l='MpServer', x=286.50, y=50.30, z=232.50], pw['Falling Block'/3042, l='MpServer', x=287.50, y=50.30, z=232.50], pw['Falling Block'/3056, l='MpServer', x=286.50, y=22.30, z=279.50], qc['Creeper'/1281, l='MpServer', x=298.50, y=23.00, z=293.50], pw['Falling Block'/3023, l='MpServer', x=281.50, y=15.81, z=139.50], qn['Skeleton'/855, l='MpServer', x=142.78, y=17.00, z=161.91], qr['Zombie'/369, l='MpServer', x=234.50, y=11.00, z=248.73], qp['Spider'/854, l='MpServer', x=140.90, y=17.97, z=162.23], pw['Falling Block'/3010, l='MpServer', x=286.50, y=27.30, z=126.50], qp['Spider'/856, l='MpServer', x=142.40, y=17.55, z=160.56], pw['Falling Block'/3013, l='MpServer', x=286.50, y=28.30, z=128.50], pw['Falling Block'/3012, l='MpServer', x=286.50, y=28.30, z=127.50], pw['Falling Block'/3034, l='MpServer', x=283.50, y=17.30, z=235.50], pw['Falling Block'/3039, l='MpServer', x=282.50, y=17.30, z=235.50], pw['Falling Block'/3036, l='MpServer', x=285.50, y=15.30, z=234.50], pw['Falling Block'/3031, l='MpServer', x=284.50, y=17.30, z=236.50], pw['Falling Block'/3406, l='MpServer', x=308.50, y=11.17, z=112.50], pw['Falling Block'/3407, l='MpServer', x=306.50, y=11.17, z=111.50], pw['Falling Block'/3404, l='MpServer', x=307.50, y=11.17, z=112.50], pw['Falling Block'/3405, l='MpServer', x=308.50, y=11.17, z=111.50], pw['Falling Block'/3403, l='MpServer', x=307.50, y=11.17, z=111.50], qn['Skeleton'/1502, l='MpServer', x=203.50, y=23.00, z=246.50], qn['Skeleton'/1503, l='MpServer', x=206.61, y=22.05, z=246.72], qn['Skeleton'/400, l='MpServer', x=266.50, y=12.00, z=278.50], qn['Skeleton'/401, l='MpServer', x=265.50, y=12.00, z=276.50], qn['Skeleton'/404, l='MpServer', x=245.50, y=41.00, z=228.50], pw['Falling Block'/3423, l='MpServer', x=303.50, y=11.17, z=109.50], pw['Falling Block'/3422, l='MpServer', x=303.50, y=11.17, z=108.50], pw['Falling Block'/3421, l='MpServer', x=303.50, y=10.17, z=107.50], qp['Spider'/393, l='MpServer', x=285.76, y=41.00, z=170.50], pw['Falling Block'/3420, l='MpServer', x=304.50, y=11.17, z=109.50], pw['Falling Block'/3419, l='MpServer', x=305.50, y=10.17, z=108.50], qn['Skeleton'/399, l='MpServer', x=265.50, y=12.00, z=278.50], pw['Falling Block'/3418, l='MpServer', x=306.50, y=10.17, z=108.50], qc['Creeper'/1474, l='MpServer', x=192.50, y=34.00, z=270.50], pw['Falling Block'/3417, l='MpServer', x=305.50, y=11.17, z=109.50], pw['Falling Block'/3416, l='MpServer', x=304.50, y=11.17, z=110.50], pw['Falling Block'/3415, l='MpServer', x=308.50, y=11.17, z=110.50], pw['Falling Block'/3414, l='MpServer', x=307.50, y=11.17, z=109.50], pw['Falling Block'/3413, l='MpServer', x=306.50, y=11.17, z=109.50], pw['Falling Block'/3412, l='MpServer', x=305.50, y=11.17, z=111.50], pw['Falling Block'/3411, l='MpServer', x=305.50, y=11.17, z=110.50], pw['Falling Block'/3410, l='MpServer', x=307.50, y=11.17, z=110.50], pw['Falling Block'/3409, l='MpServer', x=306.50, y=11.17, z=112.50], pw['Falling Block'/3408, l='MpServer', x=306.50, y=11.17, z=110.50], pw['Falling Block'/3914, l='MpServer', x=293.50, y=50.42, z=235.50], pw['Falling Block'/3436, l='MpServer', x=307.50, y=56.42, z=117.50], pw['Falling Block'/3437, l='MpServer', x=304.50, y=53.42, z=114.50], pw['Falling Block'/3912, l='MpServer', x=294.50, y=50.42, z=235.50], pw['Falling Block'/3438, l='MpServer', x=304.50, y=53.42, z=113.50], pw['Falling Block'/3913, l='MpServer', x=295.50, y=49.42, z=236.50], pw['Falling Block'/3439, l='MpServer', x=305.50, y=52.42, z=114.50], pw['Falling Block'/3432, l='MpServer', x=305.50, y=10.17, z=106.50], pw['Falling Block'/3434, l='MpServer', x=307.50, y=22.42, z=113.50], pw['Falling Block'/3435, l='MpServer', x=306.50, y=22.42, z=114.50], pw['Falling Block'/3428, l='MpServer', x=303.50, y=9.17, z=106.50], pw['Falling Block'/3429, l='MpServer', x=304.50, y=10.17, z=106.50], pw['Falling Block'/3430, l='MpServer', x=302.50, y=9.17, z=106.50], pw['Falling Block'/3431, l='MpServer', x=302.50, y=11.17, z=108.50], qc['Creeper'/435, l='MpServer', x=279.69, y=36.00, z=222.97], pw['Falling Block'/3424, l='MpServer', x=304.50, y=10.17, z=107.50], pw['Falling Block'/3911, l='MpServer', x=299.50, y=9.31, z=235.50], pw['Falling Block'/3425, l='MpServer', x=304.50, y=11.17, z=108.50], pw['Falling Block'/3426, l='MpServer', x=305.50, y=10.17, z=107.50], pw['Falling Block'/3427, l='MpServer', x=302.50, y=9.17, z=107.50], pw['Falling Block'/3445, l='MpServer', x=303.50, y=54.42, z=112.50], pw['Falling Block'/3444, l='MpServer', x=303.50, y=54.42, z=111.50], pw['Falling Block'/3447, l='MpServer', x=305.50, y=52.42, z=112.50], pw['Falling Block'/3446, l='MpServer', x=304.50, y=53.42, z=111.50], qc['Creeper'/418, l='MpServer', x=237.97, y=30.00, z=295.53], pw['Falling Block'/3441, l='MpServer', x=303.50, y=54.42, z=113.50], pw['Falling Block'/3440, l='MpServer', x=305.50, y=52.42, z=113.50], pw['Falling Block'/3443, l='MpServer', x=304.50, y=53.42, z=112.50], pw['Falling Block'/3442, l='MpServer', x=303.50, y=54.42, z=114.50], qc['Creeper'/452, l='MpServer', x=142.50, y=30.00, z=172.50], ow['Bat'/500, l='MpServer', x=235.32, y=40.49, z=248.83], pw['Falling Block'/2891, l='MpServer', x=272.50, y=4.60, z=255.50], ow['Bat'/501, l='MpServer', x=236.27, y=40.35, z=249.80], pw['Falling Block'/2896, l='MpServer', x=271.50, y=5.57, z=256.50], qc['Creeper'/1922, l='MpServer', x=228.50, y=45.00, z=257.50]]
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: 1.4.6
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_10, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 260321696 bytes (248 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 12110 (678160 bytes; 0 MB) allocated, 12110 (678160 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, VersionCheckThread, ...[com.sijobe.spc.command.StandardCommand, Achievement, Ascend, ...], [com.sijobe.spc.core.HookManager, IHook, IPlayerMP, ...], [com.sijobe.spc.hooks.CheckUpdates, InitialiseCommands, TestPlayerMP], [com.sijobe.spc.updater.UpdateCallback, CheckVersion, ModVersion], [com.sijobe.spc.util.DynamicClassLoader, KeyListener, FontColour, ...], [com.sijobe.spc.validation.Parameter, ParameterBoolean, ParameterDouble, ...], [com.sijobe.spc.worldedit.LocalPlayer, LocalWorld, PropertiesConfiguration, ...], [com.sijobe.spc.wrapper.Player, Minecraft, CommandBase, ...], [com.sk89q.minecraft.util.commands.CommandsManager, Injector, CommandException, ...], [com.sk89q.util.StringUtil], [com.sk89q.worldedit.LocalPlayer, LocalWorld, LocalConfiguration, ...], [com.sk89q.worldedit.blocks.TileEntityBlock, BaseBlock, SignBlock, ...], [com.sk89q.worldedit.commands.InsufficientArgumentsException, BiomeCommands, ChunkCommands, ...], [com.sk89q.worldedit.cui.CUIEvent, CUIRegion], [com.sk89q.worldedit.data.DataException, ChunkStoreException, MissingWorldException], [com.sk89q.worldedit.expression.ExpressionException], [com.sk89q.worldedit.filtering.GaussianKernel], [com.sk89q.worldedit.foundation.World, NbtValued, Block], [com.sk89q.worldedit.masks.Mask], [com.sk89q.worldedit.patterns.Pattern], [com.sk89q.worldedit.regions.RegionSelector, RegionOperationException, CuboidRegionSelector, ...], [com.sk89q.worldedit.scripting.CraftScriptEngine], [com.sk89q.worldedit.snapshots.InvalidSnapshotException], [com.sk89q.worldedit.tools.Tool, BlockTool], [com.sk89q.worldedit.tools.brushes.Brush], [com.sk89q.worldedit.util.PropertiesConfiguration], [eu.ha3.easy.EdgeModel, EdgeTrigger, TimeStatistic], [eu.ha3.matmos.engine.MAtmosLogger, SoundRelay, Data, ...], [eu.ha3.mc.convenience.Ha3Signal, Ha3KeyActions, Ha3KeyManager, ...], [eu.ha3.mc.haddon.Manager, Bridge, Utility, ...], [eu.ha3.util.property.contract.PropertyHolder, Versionnable, ConfigSource], [eu.ha3.util.property.simple.PropertyMissingException, ConfigProperty, VersionnableProperty, ...], [eu.ha3.util.property.test.Test], [net.sf.kdgcommons.lang.StringUtil, StringCanon], [net.sf.practicalxml.DomUtil, XmlException], [net.sf.practicalxml.util.NodeListIterator], [reifnsk.minimap.ReiMinimap, GuiScreenInterface, GuiOptionScreen, ...]
IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
ModLoader: Mods loaded: 7
ModLoader 1.4.6
mod_Audiotori r3 for 1.4.6
mod_Gibbing 1.4.6v1
mod_Gibs 1.4.6v1
mod_ReiMinimap v3.2_05 [1.4.6]
mod_TooManyItems 1.4.6 2012-12-24
mod_MAtmos r21 for 1.4.6

LWJGL: 2.4.2
OpenGL: GeForce 8800 GT/PCIe/SSE2 GL version 3.3.0, NVIDIA Corporation
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: Sphax PureBDCraft 128x MC14.zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: 4303 (240968 bytes; 0 MB) allocated, 4303 (240968 bytes; 0 MB) used

*bump*I have that SAME EXACT ERROR! Really annoying... It's caused by the mob amputation mod. I actually have a similar set up. Only happens with Amputation on.... X(

Edit: I found out how to fix it: Go into .minecraft\config\mod_Gibbing.cfg and change the value headlessdeath to 0. Save and you're done! At least, it worked for me.