I have been playing minecraft all moring, and now everytime i log into a server it crashes heres what it says:---- Minecraft Crash Report ----
// Why did you do that?

Time: 12/25/12 1:27 PM
Description: Unexpected error

java.lang.NoSuchMethodError: atk: method <init>()V not found
at net.minecraft.client.Minecraft.a(SourceFile:441)
at net.minecraft.client.Minecraft.l(SourceFile:1072)
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:
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– Head –
Stacktrace:
at net.minecraft.client.Minecraft.a(SourceFile:441)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [ays['natifresa'/17689162, l='MpServer', x=143.25, y=59.62, z=274.11]]
Chunk stats: MultiplayerChunkCache: 49
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (204,63,333), Chunk: (at 12,3,13 in 12,20; contains blocks 192,0,320 to 207,255,335), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 38707348 game time, 38735133 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: 4 total; [ays['natifresa'/17689162, l='MpServer', x=143.25, y=59.62, z=274.11], px['item.tile.cloth.white'/17686726, l='MpServer', x=162.47, y=53.13, z=275.31], px['item.tile.cloth.black'/17686724, l='MpServer', x=161.69, y=54.13, z=273.63], px['item.tile.dirt'/17686725, l='MpServer', x=163.94, y=52.13, z=273.88]]
Retry entities: 0 total; []
Stacktrace:
at ayp.a(SourceFile:281)
at net.minecraft.client.Minecraft.b(SourceFile:1871)
at net.minecraft.client.Minecraft.run(SourceFile:548)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 1.4.6
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_05, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 434892776 bytes (414 MB) / 519110656 bytes (495 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 40 (2240 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdates, ...[reifnsk.minimap.ReiMinimap, GuiScreenInterface, GuiOptionScreen, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0