Crash when i try to join a server

When i try to join a server and i klick "Join server" it just "loading server.." and after 2 sec. i get that Crash Report.

I have re-Installed that game and restarted my pc. I just don't know reason for that why it keep crashing.

---- Minecraft Crash Report ----
// I just don't know what went wrong :(

Time: 9.7.2013 19:18
Description: Unexpected error

java.lang.ClassCastException: java.lang.Byte cannot be cast to java.lang.Float
	at on.d(SourceFile:91)
	at oe.aM(SourceFile:535)
	at bfb.a(SourceFile:229)
	at bfb.a(SourceFile:397)
	at bfb.a(SourceFile:789)
	at bfb.b(SourceFile:695)
	at ats.S(SourceFile:686)
	at ats.d(SourceFile:619)
	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 on.d(SourceFile:91)
	at oe.aM(SourceFile:535)
	at bfb.a(SourceFile:229)
	at bfb.a(SourceFile:397)
	at bfb.a(SourceFile:789)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bdf['TheJoonaH'/1059566, l='MpServer', x=-4,50, y=6,62, z=34,50]]
	Chunk stats: MultiplayerChunkCache: 60
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (2391,127,3979), Chunk: (at 7,7,11 in 149,248; contains blocks 2384,0,3968 to 2399,255,3983), Region: (4,7; contains chunks 128,224 to 159,255, blocks 2048,0,3584 to 2559,255,4095)
	Level time: 93022918 game time, 93057670 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; [bdf['TheJoonaH'/1059566, l='MpServer', x=-4,50, y=6,62, z=34,50]]
	Retry entities: 0 total; []
	Server brand: ~~NULL~~
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bda.a(SourceFile:284)
	at ats.b(SourceFile:1761)
	at ats.d(SourceFile:633)
	at net.minecraft.client.main.Main.main(SourceFile:101)

-- System Details --
Details:
	Minecraft Version: 1.6.2
	Operating System: Windows 7 (x86) version 6.1
	Java Version: 1.7.0_17, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 59931184 bytes (57 MB) / 103522304 bytes (98 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 1 total; -Xmx1G
	AABB Pool Size: 19638 (1099728 bytes; 1 MB) allocated, 10824 (606144 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: AMD Radeon(TM) HD 6620G GL version 4.1.11247 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
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 18 (1008 bytes; 0 MB) allocated, 18 (1008 bytes; 0 MB) used