Details:
Level name: ULTRAWORLD
All players: 1 total; [iq['06chocho12'/62, l='ULTRAWORLD', x=48.28, y=64.00, z=2291.89]]
Chunk stats: ServerChunkCache: 1066 Drop: 0
Level seed: 1103174070283091958
Level generator: ID 00 - default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (28,64,256), Chunk: (at 12,4,0 in 1,16; contains blocks 16,0,256 to 31,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 8407794 game time, 8696543 day time
Level dimension: 0
Level storage version: 0x04ABD - Anvil
Level weather: Rain time: 22232 (now: true), thunder time: 17157 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Stacktrace:
at net.minecraft.server.MinecraftServer.r(SourceFile:743)
at net.minecraft.server.MinecraftServer.q(SourceFile:686)
at bdo.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:620)
at fy.run(SourceFile:856)

– System Details –
Details:
Minecraft Version: 1.4.5
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_09, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 361601720 bytes (344 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 4457 (249592 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: No suspicious classes found.
IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
Profiler Position: N/A (disabled)
Vec3 Pool Size: 1174 (65744 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Player Count: 1 / 8; [iq['06chocho12'/62, l='ULTRAWORLD', x=48.28, y=64.00, z=2291.89]]
Type: Integrated Server (map_client.txt)
Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.

java.lang.ArrayIndexOutOfBoundsException: 406
at zq.a(SourceFile:28)
at zt.d(SourceFile:109)
at zs.a(SourceFile:460)
at xv.b(SourceFile:608)
at amp.b(SourceFile:106)
at in.g(SourceFile:296)
at in.b(SourceFile:139)
at net.minecraft.server.MinecraftServer.r(SourceFile:743)
at net.minecraft.server.MinecraftServer.q(SourceFile:686)
at bdo.q(SourceFile:117)
at net.minecraft.server.MinecraftServer.run(SourceFile:620)
at fy.run(SourceFile:856)
— END ERROR REPORT 64ced045 ----------