Crash

---- Minecraft Crash Report ----
// Hi. I'm Minecraft, and I'm a crashaholic.

Time: 05.07.2013 17:25
Description: Unexpected error

java.lang.NullPointerException
	at bey.a(SourceFile:509)
	at bey.b(SourceFile:483)
	at bet.b(SourceFile:474)
	at bet.a(SourceFile:930)
	at bet.b(SourceFile:695)
	at atn.S(SourceFile:685)
	at atn.d(SourceFile:618)
	at net.minecraft.client.main.Main.main(SourceFile:101)


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

-- Head --
Stacktrace:
	at bey.a(SourceFile:509)
	at bey.b(SourceFile:483)
	at bet.b(SourceFile:474)
	at bet.a(SourceFile:930)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bcx['ismailcelik'/242601, l='MpServer', x=-2640,87, y=66,62, z=-3498,29]]
	Chunk stats: MultiplayerChunkCache: 30
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-2636,65,-3534), Chunk: (at 4,4,2 in -165,-221; contains blocks -2640,0,-3536 to -2625,255,-3521), Region: (-6,-7; contains chunks -192,-224 to -161,-193, blocks -3072,0,-3584 to -2561,255,-3073)
	Level time: 133852035 game time, 169585447 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: 1 total; [bcx['ismailcelik'/242601, l='MpServer', x=-2640,87, y=66,62, z=-3498,29]]
	Retry entities: 0 total; []
Stacktrace:
	at bcu.a(SourceFile:284)
	at atn.b(SourceFile:1743)
	at atn.d(SourceFile:632)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.1
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.6.0_22, Sun Microsystems Inc.
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
	Memory: 106864024 bytes (101 MB) / 214630400 bytes (204 MB) up to 954466304 bytes (910 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 9260 (518560 bytes; 0 MB) allocated, 9260 (518560 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.1
	LWJGL: 2.9.0
	OpenGL: AMD Radeon(TM) HD 6470M GL version 4.1.10428 Compatibility Profile Context, ATI Technologies Inc.
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: Default
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 29 (1624 bytes; 0 MB) allocated, 29 (1624 bytes; 0 MB) used