EndOfStream / Crash reports

--- Minecraft Crash Report ----
// Quite honestly, I wouldn't worry myself about that.

Time: 14-11-12 19:46
Description: Exception in world tick

java.lang.ArrayIndexOutOfBoundsException
	at java.lang.System.arraycopy(Native Method)
	at zs.a(SourceFile:820)
	at axz.a(SourceFile:851)
	at du.a(SourceFile:135)
	at cg.b(SourceFile:349)
	at axz.d(SourceFile:80)
	at ayh.b(SourceFile:62)
	at net.minecraft.client.Minecraft.l(SourceFile:1331)
	at net.minecraft.client.Minecraft.J(SourceFile:582)
	at net.minecraft.client.Minecraft.run(SourceFile:534)
	at java.lang.Thread.run(Unknown Source)


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

-- Head --
Stacktrace:
	at java.lang.System.arraycopy(Native Method)
	at zs.a(SourceFile:820)
	at axz.a(SourceFile:851)
	at du.a(SourceFile:135)
	at cg.b(SourceFile:349)
	at axz.d(SourceFile:80)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [ayk['pystacraft21'/220, l='MpServer', x=-130,50, y=7,62, z=864,50]]
	Chunk stats: MultiplayerChunkCache: 2
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (259,64,-294), Chunk: (at 3,4,10 in 16,-19; contains blocks 256,0,-304 to 271,255,-289), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 12007566 game time, 12032976 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 1 total; [ayk['pystacraft21'/220, l='MpServer', x=-130,50, y=7,62, z=864,50]]
	Retry entities: 0 total; []
Stacktrace:
	at ayh.a(SourceFile:290)
	at net.minecraft.client.Minecraft.l(SourceFile:1338)
	at net.minecraft.client.Minecraft.J(SourceFile:582)
	at net.minecraft.client.Minecraft.run(SourceFile:534)
	at java.lang.Thread.run(Unknown Source)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [ayk['pystacraft21'/220, l='MpServer', x=-130,50, y=7,62, z=864,50]]
	Chunk stats: MultiplayerChunkCache: 2
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (259,64,-294), Chunk: (at 3,4,10 in 16,-19; contains blocks 256,0,-304 to 271,255,-289), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Level time: 12007566 game time, 12032976 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: true), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 1 total; [ayk['pystacraft21'/220, l='MpServer', x=-130,50, y=7,62, z=864,50]]
	Retry entities: 0 total; []

-- System Details --
Details:
	Minecraft Version: 1.4.4
	Operating System: Windows Vista (x86) version 6.0
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 457244000 bytes (436 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 10869 (608664 bytes; 0 MB) allocated, 10869 (608664 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	LWJGL: 2.4.2
	OpenGL: GeForce 9600M GS/PCI/SSE2 GL version 2.1.2, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Texture Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 52 (2912 bytes; 0 MB) allocated, 52 (2912 bytes; 0 MB) used