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Minecraft has crashed!
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Minecraft has stopped running because it encountered a problem; Unexpected error
This error has been saved to C:\Users\James\AppData\Roaming\.minecraft\crash-reports\crash-2012-10-27_09.42.57-client.txt for your convenience. Please include a copy of this file if you report this crash to anyone.



--- BEGIN ERROR REPORT 538e468e --------
Generated 10/27/12 9:42 AM

- Minecraft Version: 1.4.2
- 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: 455287672 bytes (434 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
- JVM Flags: 2 total; -Xms512m -Xmx1024m
- AABB Pool Size: 8461 (473816 bytes; 0 MB) allocated, 14 (784 bytes; 0 MB) used
- LWJGL: 2.4.2
- OpenGL: Mobile Intel(R) 4 Series Express Chipset Family GL version 2.1.0 - Build 8.15.10.2555, Intel
- Is Modded: Probably not
- Type: Client
- Texture Pack: Default
- Profiler Position: N/A (disabled)
- Vec3 Pool Size: 30 (1680 bytes; 0 MB) allocated, 17 (952 bytes; 0 MB) used
- World MpServer Entities: 3 total; [axc['Deity_Dark_Link'/13684635, l='MpServer', x=135.98, y=67.62, z=-90.75], qa['Zombie'/-2147483644, l='MpServer', x=136.84, y=66.50, z=-81.34], lq['Painting'/12726931, l='MpServer', x=131.94, y=67.00, z=-82.50]]
- World MpServer Players: 1 total; [axc['Deity_Dark_Link'/13684635, l='MpServer', x=135.98, y=67.62, z=-90.75]]
- World MpServer Chunk Stats: MultiplayerChunkCache: 0
- Forced Entities: 4 total; [axc['Deity_Dark_Link'/13684635, l='MpServer', x=135.98, y=67.62, z=-90.75], lq['Painting'/12726931, l='MpServer', x=131.94, y=67.00, z=-82.50], qa['Zombie'/-2147483644, l='MpServer', x=136.84, y=66.50, z=-81.34], lq['Painting'/12726931, l='MpServer', x=131.94, y=67.00, z=-82.50]]
- Retry Entities: 0 total; []

java.lang.ClassCastException: java.lang.Integer cannot be cast to java.lang.Byte
at lt.a(SourceFile:83)
at qa.h_(SourceFile:97)
at qa.by(SourceFile:61)
at ln.c(SourceFile:1131)
at ps.c(SourceFile:25)
at qa.c(SourceFile:137)
at ln.j_(SourceFile:531)
at ps.j_(SourceFile:30)
at qa.j_(SourceFile:152)
at xe.a(SourceFile:1218)
at xe.g(SourceFile:1197)
at xe.h(SourceFile:1122)
at net.minecraft.client.Minecraft.l(SourceFile:1278)
at net.minecraft.client.Minecraft.J(SourceFile:582)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)
--- END ERROR REPORT 1de9af3b ----------

yes i was, is this good or bad? and how can i fix it?

Mod overuse? (If you have any) Maybe Mojang is having technical difficultys. Just a guess. -.-