Wie die Überschrift schon sagt crasht MC in meinem Keller andauernd hier die Meldung:
Minecraft has crashed!
----------------------
Minecraft has stopped running because it encountered a problem; Rendering entity in world
A full error report has been saved to C:\Users\Toshiba\AppData\Roaming\.minecraft\crash-reports\crash-2013-02-03_00.10.47-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash 
--- BEGIN ERROR REPORT 9d68ccfd --------
Full report at:
C:\Users\Toshiba\AppData\Roaming\.minecraft\crash-reports\crash-2013-02-03_00.10.47-client.txt
Please show that file to Mojang, NOT just this screen!
Generated 03.02.13 00:10
-- Head --
Stacktrace:
at bdf.a(SourceFile:53)
at bcd.b(SourceFile:137)
at bcd.a(SourceFile:31)
at bcd.a(SourceFile:14)
-- Entity being rendered --
Details:
Entity Type: ItemFrame (mc)
Entity ID: 30485431
Name: entity.ItemFrame.name
Exact location: 6633,94, 69,50, 1228,50
Block location: World: (6633,69,1228 ), Chunk: (at 9,4,12 in 414,76; contains blocks 6624,0,1216 to 6639,255,1231), Region: (12,2; contains chunks 384,64 to 415,95, blocks 6144,0,1024 to 6655,255,1535)
Momentum: 0,00, 0,00, 0,00
-- Renderer details --
Details:
Assigned renderer: bcd@32ef2d
Location: 11,23,11,91,4,06 - World: (11,11,4), Chunk: (at 11,0,4 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Rotation: 90.0
Delta: 0.85897374
Stacktrace:
at bbu.a(SourceFile:195)
at bbu.a(SourceFile:175)
at bav.a(RenderGlobal.java:479)
at ban.a(EntityRenderer.java:1585)
-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [ays['Cirtap1998'/30485429, l='MpServer', x=6622,71, y=57,62, z=1224,43]]
Chunk stats: MultiplayerChunkCache: 121
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-820,62,1417), Chunk: (at 12,3,9 in -52,88; contains blocks -832,0,1408 to -817,255,1423), Region: (-2,2; contains chunks -64,64 to -33,95, blocks -1024,0,1024 to -513,255,1535)
Level time: 567697949 game time, 568499680 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: 12 total; [mc['entity.ItemFrame.name'/30485433, l='MpServer', x=6633,94, y=69,50, z=1226,50], ays['Cirtap1998'/30485429, l='MpServer', x=6622,71, y=57,62, z=1224,43], mc['entity.ItemFrame.name'/30485432, l='MpServer', x=6633,94, y=69,50, z=1229,50], mc['entity.ItemFrame.name'/30485435, l='MpServer', x=6632,94, y=69,50, z=1232,50], mc['entity.ItemFrame.name'/30485434, l='MpServer', x=6632,94, y=69,50, z=1231,50], mc['entity.ItemFrame.name'/30485439, l='MpServer', x=6606,94, y=71,50, z=1285,50], mc['entity.ItemFrame.name'/30485438, l='MpServer', x=6606,94, y=71,50, z=1281,50], ow['Fledermaus'/30485447, l='MpServer', x=6567,27, y=33,00, z=1167,20], ph['Tintenfisch'/30485442, l='MpServer', x=6636,63, y=58,25, z=1158,88], ph['Tintenfisch'/30485443, l='MpServer', x=6643,97, y=56,88, z=1167,45], mc['entity.ItemFrame.name'/30485431, l='MpServer', x=6633,94, y=69,50, z=1228,50], mc['entity.ItemFrame.name'/30485430, l='MpServer', x=6633,94, y=69,50, z=1227,50]]
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_20, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
Memory: 349543656 bytes (333 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 3600 (201600 bytes; 0 MB) allocated, 2218 (124208 bytes; 0 MB) used
Suspicious classes: TextureHDFX, TextureHDCustomFX, TextureHDLavaFX, ...[com.pclewis.mcpatcher.MCPatcherUtils, Config, ChangeHandler, ...], [com.pclewis.mcpatcher.mod.Colorizer, BiomeHelper, Stub, ...], [reifnsk.minimap.ReiMinimap, GuiScreenInterface, GuiOptionScreen, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: AMD Radeon HD 6310 Graphics GL version 4.1.10834 Compatibility Profile Context, ATI Technologies Inc.
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: [1.4.5] R3D CRAFT 64x64 (65%).zip
Profiler Position: N/A (disabled)
Vec3 Pool Size: 4995 (279720 bytes; 0 MB) allocated, 537 (30072 bytes; 0 MB) used
java.lang.ArrayIndexOutOfBoundsException: 256
at bdf.a(SourceFile:53)
at bcd.b(SourceFile:137)
at bcd.a(SourceFile:31)
at bcd.a(SourceFile:14)
at bbu.a(SourceFile:195)
at bbu.a(SourceFile:175)
at bav.a(RenderGlobal.java:479)
at ban.a(EntityRenderer.java:1585)
at ban.b(EntityRenderer.java:1117)
at net.minecraft.client.Minecraft.J(SourceFile:605)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 3ea1df9d ----------
Hoffentlich kann einer von euch mir helfen. Hab in solchen Sachen leider keine Ahnung 
MfG Paddy/Cirtap1998
(meistens passiert dieser fehler weil man im multiplayer ist und dort wird halt öffter der chunk verändert ;))
