Hopper: java.lang.NullPointerException bfi.a(SourceFile:1082)

java.lang.NullPointerException
	at bfi.a(SourceFile:1082)
	at bfb.a(SourceFile:814)

---- Minecraft Crash Report ----
// I blame Dinnerbone.

Time: 8/3/13 10:57 AM
Description: Unexpected error

java.lang.ClassCastException:  cannot be cast to bex
	at bfi.a(SourceFile:1082)
	at bfb.a(SourceFile:814)
	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 bfi.a(SourceFile:1082)
	at bfb.a(SourceFile:814)

-- Affected level --
Details:
	Level name: MpServer
	All players: 2 total; [bdf['RnBw_PwNyZz'/200, l='MpServer', x=71.42, y=65.62, z=96.42], bev['ChannerMC'/67437, l='MpServer', x=116.25, y=63.00, z=99.53]]
	Chunk stats: MultiplayerChunkCache: 441
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (20,64,248), Chunk: (at 4,4,8 in 1,15; contains blocks 16,0,240 to 31,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 81581 game time, 40627 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: 48 total; [rn['Bat'/153040, l='MpServer', x=3.53, y=37.10, z=28.75], bev['ChannerMC'/67437, l='MpServer', x=116.25, y=63.00, z=99.53], sr['item.item.leather'/153594, l='MpServer', x=39.16, y=63.13, z=92.13], ug['arrow'/152905, l='MpServer', x=81.00, y=64.00, z=123.22], ug['arrow'/154144, l='MpServer', x=38.09, y=63.03, z=83.31], ry['Sheep'/154, l='MpServer', x=144.47, y=67.00, z=156.66], nz['Experience Orb'/149813, l='MpServer', x=107.47, y=63.25, z=84.91], rn['Bat'/152363, l='MpServer', x=5.75, y=36.10, z=40.25], od['entity.LeashKnot.name'/150897, l='MpServer', x=116.50, y=63.50, z=101.50], rn['Bat'/152360, l='MpServer', x=7.25, y=40.06, z=41.72], rn['Bat'/137499, l='MpServer', x=37.31, y=22.10, z=58.00], rr['Horse'/142647, l='MpServer', x=117.47, y=63.00, z=102.50], ry['Sheep'/151, l='MpServer', x=144.50, y=70.00, z=152.34], rn['Bat'/153039, l='MpServer', x=9.21, y=36.00, z=26.29], rn['Bat'/151999, l='MpServer', x=6.75, y=36.10, z=41.75], rn['Bat'/154268, l='MpServer', x=77.52, y=20.23, z=69.33], od['entity.LeashKnot.name'/89023, l='MpServer', x=128.50, y=64.50, z=87.50], rr['Horse'/137158, l='MpServer', x=33.07, y=63.00, z=83.70], rn['Bat'/154515, l='MpServer', x=21.20, y=15.00, z=48.68], rn['Bat'/150729, l='MpServer', x=98.75, y=49.10, z=119.31], nz['Experience Orb'/153643, l='MpServer', x=35.75, y=63.25, z=97.41], rr['AppleBee'/52452, l='MpServer', x=129.91, y=65.00, z=88.75], bdf['RnBw_PwNyZz'/200, l='MpServer', x=71.42, y=65.62, z=96.42], ry['Sheep'/76, l='MpServer', x=-7.56, y=68.00, z=139.34], rn['Bat'/151297, l='MpServer', x=30.38, y=45.10, z=60.53], rn['Bat'/152848, l='MpServer', x=36.25, y=25.10, z=38.25], rn['Bat'/152849, l='MpServer', x=21.25, y=25.10, z=28.75], rn['Bat'/151320, l='MpServer', x=4.28, y=15.00, z=75.25], rn['Bat'/150014, l='MpServer', x=50.06, y=45.00, z=86.04], sb['Squid'/151324, l='MpServer', x=122.38, y=58.06, z=55.50], sb['Squid'/151326, l='MpServer', x=114.53, y=56.31, z=66.88], rr['Horse'/137833, l='MpServer', x=79.25, y=64.00, z=98.75], ry['Sheep'/95, l='MpServer', x=33.97, y=72.00, z=160.09], ry['Sheep'/94, l='MpServer', x=40.81, y=70.00, z=152.19], ry['Sheep'/91, l='MpServer', x=29.59, y=72.00, z=155.28], ry['Sheep'/90, l='MpServer', x=29.22, y=72.00, z=162.88], bev['ChannerMC'/67437, l='MpServer', x=116.25, y=63.00, z=99.53], rn['Bat'/154571, l='MpServer', x=69.47, y=21.73, z=31.75], nz['Experience Orb'/136712, l='MpServer', x=118.73, y=63.25, z=94.81], rn['Bat'/154565, l='MpServer', x=16.75, y=21.00, z=25.75], od['entity.LeashKnot.name'/151783, l='MpServer', x=117.50, y=63.50, z=101.50], rr['Horse'/141451, l='MpServer', x=115.72, y=63.00, z=102.44], rn['Bat'/153474, l='MpServer', x=3.17, y=50.01, z=17.32], rn['Bat'/153476, l='MpServer', x=31.75, y=19.10, z=40.63], ry['Sheep'/114, l='MpServer', x=70.25, y=70.00, z=171.13], rn['Bat'/153477, l='MpServer', x=30.09, y=18.00, z=41.11], ug['arrow'/153707, l='MpServer', x=24.88, y=62.00, z=84.59], rn['Bat'/150512, l='MpServer', x=46.36, y=39.78, z=49.73]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer 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 XP (x86) version 5.1
	Java Version: 1.7.0_09, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 108398776 bytes (103 MB) / 306495488 bytes (292 MB) up to 518979584 bytes (494 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M
	AABB Pool Size: 2152 (120512 bytes; 0 MB) allocated, 1097 (61432 bytes; 0 MB) used
	Suspicious classes: No suspicious classes found.
	IntCache: cache: 0, tcache: 0, allocated: 3, tallocated: 63
	Launched Version: 1.6.2
	LWJGL: 2.9.0
	OpenGL: GeForce 6600/AGP/SSE2/3DNOW! GL version 2.1.2, NVIDIA Corporation
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Pack: SixtyGig_Alpha_64x_MC16.zip
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 2051 (114856 bytes; 0 MB) allocated, 461 (25816 bytes; 0 MB) used