I can't log on to Minecraft 1.6.1 Multiplayer. I crash every time I try.

---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 7/3/13 12:27 PM
Description: Unexpected error

java.lang.NullPointerException
	at bcu.a(SourceFile:308)
	at bdn.l_(SourceFile:74)
	at bdw.a(SourceFile:57)
	at atn.k(SourceFile:1396)
	at atn.S(SourceFile:662)
	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:
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-- System Details --
Details:
	Minecraft Version: 1.6.1
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 69258800 bytes (66 MB) / 120852480 bytes (115 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 20405 (1142680 bytes; 1 MB) allocated, 20405 (1142680 bytes; 1 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 HD 6310 Graphics  GL version 4.0.10318 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: ~~ERROR~~ NullPointerException: null