---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 5/4/13 7:06 AM
Description: Exception while updating neighbours

java.lang.ClassCastException: aqz cannot be cast to aqo
	at ama.a(SourceFile:196)
	at aao.g(SourceFile:469)
	at aao.f(SourceFile:450)
	at aao.d(SourceFile:415)
	at aao.f(SourceFile:316)
	at aao.i(SourceFile:378)
	at jf.d(SourceFile:176)
	at jf.b(SourceFile:195)
	at jf.a(SourceFile:110)
	at jj.a(SourceFile:327)
	at en.a(SourceFile:46)
	at cj.b(SourceFile:64)
	at jj.d(SourceFile:56)
	at jm.b(SourceFile:37)
	at bhd.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.s(SourceFile:490)
	at net.minecraft.server.MinecraftServer.r(SourceFile:407)
	at bha.r(SourceFile:125)
	at net.minecraft.server.MinecraftServer.run(SourceFile:341)
	at gr.run(SourceFile:584)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at ama.a(SourceFile:196)

-- Block being updated --
Details:
	Source block type: ID #3 (tile.dirt // amn)
	Block type: ID #54 (tile.chest // ama)
	Block data value: 2 / 0x2 / 0b0010
	Block location: World: (-50,62,1158), Chunk: (at 14,3,6 in -4,72; contains blocks -64,0,1152 to -49,255,1167), Region: (-1,2; contains chunks -32,64 to -1,95, blocks -512,0,1024 to -1,255,1535)
Stacktrace:
	at aao.g(SourceFile:469)
	at aao.f(SourceFile:450)
	at aao.d(SourceFile:415)
	at aao.f(SourceFile:316)
	at aao.i(SourceFile:378)
	at jf.d(SourceFile:176)
	at jf.b(SourceFile:195)
	at jf.a(SourceFile:110)
	at jj.a(SourceFile:327)
	at en.a(SourceFile:46)
	at cj.b(SourceFile:64)
	at jj.d(SourceFile:56)

-- Ticking connection --
Details:
	Connection: jj@1fe4d40
Stacktrace:
	at jm.b(SourceFile:37)
	at bhd.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.s(SourceFile:490)
	at net.minecraft.server.MinecraftServer.r(SourceFile:407)
	at bha.r(SourceFile:125)
	at net.minecraft.server.MinecraftServer.run(SourceFile:341)
	at gr.run(SourceFile:584)

-- System Details --
Details:
	Minecraft Version: 13w18c
	Operating System: Windows Vista (x86) version 6.0
	Java Version: 1.6.0_37, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Sun Microsystems Inc.
	Memory: 80122904 bytes (76 MB) / 230653952 bytes (219 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 1431 (80136 bytes; 0 MB) allocated, 1295 (72520 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 287 (16072 bytes; 0 MB) allocated, 231 (12936 bytes; 0 MB) used
	Player Count: 1 / 8; [je['Neospector'/125, l='Questing', x=-49.49, y=63.00, z=1157.30]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.