After Right/ Left clicking while sneaking, you no longer sneak

Please force a crash by holding F3+C for 10 seconds, releasing it afterwards. Upload the crashreport to this ticket.

I just installed Optifine 😛

Minecraft has crashed!
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Minecraft has stopped running because it encountered a problem; Manually triggered debug crash

A full error report has been saved to E:\Users\Vidya\AppData\Roaming\.minecraft\crash-reports\crash-2013-03-24_09.33.46-client.txt - Please include a copy of that file (Not this screen!) if you report this crash to anyone; without it, they will not be able to help fix the crash 😞

— BEGIN ERROR REPORT 5d51c3a5 --------
Full report at:
E:\Users\Vidya\AppData\Roaming\.minecraft\crash-reports\crash-2013-03-24_09.33.46-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 24/3/13 9:33 AM

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bdw['KingLava'/16, l='MpServer', x=-7.23, y=238.62, z=-3.90]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (0,4,0), Chunk: (at 0,0,0 in 0,0; contains blocks 0,0,0 to 15,255,15), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 35949 game time, 7566 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: creative (ID 1). Hardcore: false. Cheats: false
Forced entities: 3 total; [rj['entity.MinecartChest.name'/7, l='MpServer', x=-69.50, y=22.50, z=48.50], bdw['KingLava'/16, l='MpServer', x=-7.23, y=238.62, z=-3.90], ss['arrow'/10739, l='MpServer', x=36.03, y=237.00, z=-53.25]]
Retry entities: 0 total; []
Stacktrace:
at bdt.a(SourceFile:282)
at net.minecraft.client.Minecraft.b(SourceFile:1881)
at net.minecraft.client.Minecraft.run(SourceFile:535)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 1.5.1
Operating System: Windows 7 (x86) version 6.1
Java Version: 1.7.0_15, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode, sharing), Oracle Corporation
Memory: 8239888 bytes (7 MB) / 259522560 bytes (247 MB) up to 259522560 bytes (247 MB)
JVM Flags: 0 total;
AABB Pool Size: 350 (19600 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdaterThreaded, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.8.5
OpenGL: Intel 945G GL version 1.4.0 - Build 8.14.10.1930, Intel
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: Default
Profiler Position: N/A (disabled)
Vec3 Pool Size: 215 (12040 bytes; 0 MB) allocated, 14 (784 bytes; 0 MB) used

java.lang.Throwable
at net.minecraft.client.Minecraft.l(SourceFile:1164)
at net.minecraft.client.Minecraft.K(SourceFile:574)
at net.minecraft.client.Minecraft.run(SourceFile:526)
at java.lang.Thread.run(Unknown Source)
— END ERROR REPORT 85c1b6be ----------

This ticket is invalid as it relates to a modded or 3rd party client/server.

• Any non-standard client/server build needs to be taken up with the appropriate team, not Mojang.

• Any plugin issues need to be addressed to the plugin creator.

• This site is for addressing issues related to the base unmodded MineCraft.