---- Minecraft Crash Report ----
// Ouch. That hurt :(

Time: 27.01.13 17:16
Description: Ticking memory connection

java.lang.ArrayIndexOutOfBoundsException: 4
	at rx.f(SourceFile:396)
	at rz.q(SourceFile:1309)
	at tx.a(SourceFile:237)
	at vv.a(SourceFile:103)
	at jb.a(SourceFile:218)
	at jf.a(SourceFile:363)
	at fn.a(SourceFile:58)
	at cf.b(SourceFile:55)
	at jf.d(SourceFile:61)
	at jg.b(SourceFile:39)
	at bhz.b(SourceFile:84)
	at net.minecraft.server.MinecraftServer.r(SourceFile:478)
	at net.minecraft.server.MinecraftServer.q(SourceFile:395)
	at bhw.q(SourceFile:117)
	at net.minecraft.server.MinecraftServer.run(SourceFile:329)
	at gn.run(SourceFile:565)


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

-- System Details --
Details:
	Minecraft Version: 13w04a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_04, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 387036272 bytes (369 MB) / 1034158080 bytes (986 MB) up to 1034158080 bytes (986 MB)
	JVM Flags: 2 total; -Xms1024m -Xmx1024m
	AABB Pool Size: 3504 (196224 bytes; 0 MB) allocated, 3232 (180992 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: 2666 (149296 bytes; 0 MB) allocated, 1710 (95760 bytes; 0 MB) used
	Player Count: 1 / 8; [ja['matthias2000123'/360008, l='Wer ist besser', x=178,71, y=70,13, z=252,85]]
	Type: Integrated Server (map_client.txt)
	Is Modded: Very likely; Jar signature invalidated