2012-03-04 21:54:39 [SEVERE] java.lang.NoSuchFieldError: G
2012-03-04 21:54:39 [SEVERE] at lishid.orebfuscator.chunkscrambler.ScrambledWorldChunkManager.getBiome(ScrambledWorldChunkManager.java:32)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.World.getBiome(World.java:93)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.World.c(World.java:2057)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.World.t(World.java:2053)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.World.l(World.java:1989)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.World.doTick(World.java:1755)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:541)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
2012-03-04 21:54:39 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)
2012-03-04 21:54:39 [SEVERE] Unexpected exception
java.lang.NoSuchFieldError: G
at lishid.orebfuscator.chunkscrambler.ScrambledWorldChunkManager.getBiome(ScrambledWorldChunkManager.java:32)
at net.minecraft.server.World.getBiome(World.java:93)
at net.minecraft.server.World.c(World.java:2057)
at net.minecraft.server.World.t(World.java:2053)
at net.minecraft.server.World.l(World.java:1989)
at net.minecraft.server.World.doTick(World.java:1755)
at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:541)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:452)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:490)


help?