Minecraft Crash

---- Minecraft Crash Report ----
// Shall we play a game?

Time: 2/4/13 9:10 PM
Description: Playing level event

java.lang.NullPointerException
	at bav.a(SourceFile:1629)
	at yc.a(SourceFile:2480)
	at yc.f(SourceFile:2474)
	at ayh.a(SourceFile:906)
	at du.a(SourceFile:45)
	at cg.b(SourceFile:349)
	at ayh.d(SourceFile:80)
	at ayp.b(SourceFile:57)
	at net.minecraft.client.Minecraft.l(SourceFile:1332)
	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 bav.a(SourceFile:1629)

-- Level event being played --
Details:
	Block coordinates: World: (610,36,-625), Chunk: (at 2,2,15 in 38,-40; contains blocks 608,0,-640 to 623,255,-625), Region: (1,-2; contains chunks 32,-64 to 63,-33, blocks 512,0,-1024 to 1023,255,-513)
	Event source: ~~NULL~~
	Event type: 2001
	Event data: 331
Stacktrace:
	at yc.a(SourceFile:2480)
	at yc.f(SourceFile:2474)
	at ayh.a(SourceFile:906)
	at du.a(SourceFile:45)
	at cg.b(SourceFile:349)
	at ayh.d(SourceFile:80)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [ays['DivinePotent'/68828, l='MpServer', x=611.38, y=39.37, z=-624.66]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options:
	Level spawn location: World: (618,37,-640), Chunk: (at 10,2,0 in 38,-40; contains blocks 608,0,-640 to 623,255,-625), Region: (1,-2; contains chunks 32,-64 to 63,-33, blocks 512,0,-1024 to 1023,255,-513)
	Level time: 42005 game time, 29734 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 3 total; [ays['DivinePotent'/68828, l='MpServer', x=611.38, y=39.37, z=-624.66], px['item.item.rottenFlesh'/51807, l='MpServer', x=643.63, y=33.13, z=-592.41], px['item.item.rottenFlesh'/50252, l='MpServer', x=638.63, y=33.13, z=-584.25]]
	Retry entities: 0 total; []
Stacktrace:
	at ayp.a(SourceFile:281)
	at net.minecraft.client.Minecraft.l(SourceFile:1339)
	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; [ays['DivinePotent'/68828, l='MpServer', x=611.38, y=39.37, z=-624.66]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options:
	Level spawn location: World: (618,37,-640), Chunk: (at 10,2,0 in 38,-40; contains blocks 608,0,-640 to 623,255,-625), Region: (1,-2; contains chunks 32,-64 to 63,-33, blocks 512,0,-1024 to 1023,255,-513)
	Level time: 42005 game time, 29734 day time
	Level dimension: 0
	Level storage version: 0x00000 - Unknown?
	Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: false
	Forced entities: 3 total; [ays['DivinePotent'/68828, l='MpServer', x=611.38, y=39.37, z=-624.66], px['item.item.rottenFlesh'/51807, l='MpServer', x=643.63, y=33.13, z=-592.41], px['item.item.rottenFlesh'/50252, l='MpServer', x=638.63, y=33.13, z=-584.25]]
	Retry entities: 0 total; []

-- System Details --
Details:
	Minecraft Version: 1.4.7
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_13, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 373466240 bytes (356 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 13656 (764736 bytes; 0 MB) allocated, 31 (1736 bytes; 0 MB) used
	Suspicious classes: ~~ERROR~~ NoClassDefFoundError: com/pclewis/mcpatcher/mod/TileOverride$1
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	LWJGL: 2.4.2
	OpenGL: AMD Radeon HD 6970M GL version 4.1.10428 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Very likely; Jar signature invalidated
	Type: Client (map_client.txt)
	Texture Pack: [1.4.6] FaithfulVenom.zip
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 62 (3472 bytes; 0 MB) allocated, 17 (952 bytes; 0 MB) used