Crash report

---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 20/01/13 13:25
Description: Unexpected error

java.lang.NullPointerException
	at bdv.a(SourceFile:503)
	at bdv.b(SourceFile:478)
	at bdo.b(SourceFile:515)
	at bdo.a(SourceFile:984)
	at bdo.b(SourceFile:749)
	at net.minecraft.client.Minecraft.K(SourceFile:596)
	at net.minecraft.client.Minecraft.run(SourceFile:525)
	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 bdv.a(SourceFile:503)
	at bdv.b(SourceFile:478)
	at bdo.b(SourceFile:515)
	at bdo.a(SourceFile:984)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bbt['superfreexa'/257, l='MpServer', x=-3584.49, y=75.47, z=705.88]]
	Chunk stats: MultiplayerChunkCache: 10
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options:
	Level spawn location: World: (72,64,256), Chunk: (at 8,4,0 in 4,16; contains blocks 64,0,256 to 79,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 12660696 game time, 14281687 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: survival (ID 0). Hardcore: false. Cheats: false
	Forced entities: 6 total; [ps['Squid'/258, l='MpServer', x=-3585.50, y=56.38, z=705.50], rf['Slime'/373, l='MpServer', x=-3568.31, y=54.00, z=716.31], ps['Squid'/372, l='MpServer', x=-3582.50, y=56.00, z=702.50], rf['Slime'/375, l='MpServer', x=-3565.31, y=53.00, z=718.31], ps['Squid'/364, l='MpServer', x=-3589.69, y=56.00, z=699.72], bbt['superfreexa'/257, l='MpServer', x=-3584.49, y=75.47, z=705.88]]
	Retry entities: 0 total; []
Stacktrace:
	at bbq.a(SourceFile:281)
	at net.minecraft.client.Minecraft.b(SourceFile:1865)
	at net.minecraft.client.Minecraft.run(SourceFile:539)
	at java.lang.Thread.run(Unknown Source)

-- System Details --
Details:
	Minecraft Version: 13w03a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_10, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 355840672 bytes (339 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 2 total; -Xms512m -Xmx1024m
	AABB Pool Size: 18931 (1060136 bytes; 1 MB) allocated, 46 (2576 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 1, tallocated: 63
	LWJGL: 2.4.2
	OpenGL: GeForce GT 530/PCIe/SSE2 GL version 4.2.0, 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: 95 (5320 bytes; 0 MB) allocated, 58 (3248 bytes; 0 MB) used