Hopper: java.lang.ClassCastException: zb cannot be cast to bdf

java.lang.ClassCastException: zb cannot be cast to bdf
	at bdd.a(SourceFile:176)
	at bcp.b(SourceFile:423)
	at bdd.b(SourceFile:412)
	at bbp.d(SourceFile:240)
	at bdd.d(SourceFile:489)
	at bbp.k(SourceFile:211)

---- Minecraft Crash Report ----
// There are four lights!

Time: 10/13/13 10:19 AM
Description: Updating screen events

java.lang.ClassCastException: zb cannot be cast to bdf
	at bdd.a(SourceFile:176)
	at bcp.b(SourceFile:423)
	at bdd.b(SourceFile:412)
	at bbp.d(SourceFile:240)
	at bdd.d(SourceFile:489)
	at bbp.k(SourceFile:211)
	at ayp.o(SourceFile:1303)
	at ayp.ab(SourceFile:755)
	at ayp.e(SourceFile:706)
	at net.minecraft.client.main.Main.main(SourceFile:103)


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Stacktrace:
	at bdd.a(SourceFile:176)
	at bcp.b(SourceFile:423)
	at bdd.b(SourceFile:412)
	at bbp.d(SourceFile:240)
	at bdd.d(SourceFile:489)
	at bbp.k(SourceFile:211)

-- Affected screen --
Details:
	Screen name: bdd

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bil['cadecraft2004'/304, l='MpServer', x=71.55, y=82.97, z=187.90]]
	Chunk stats: MultiplayerChunkCache: 360, 360
	Level seed: 0
	Level generator: ID 00 - default, ver 1. Features enabled: false
	Level generator options: 
	Level spawn location: World: (216,64,244), Chunk: (at 8,4,4 in 13,15; contains blocks 208,0,240 to 223,255,255), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 38143 game time, 41305 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: 45 total; [uh['Bat'/93187, l='MpServer', x=8.17, y=54.35, z=136.49], uh['Bat'/93206, l='MpServer', x=10.50, y=24.07, z=263.31], uh['Bat'/93204, l='MpServer', x=117.22, y=38.35, z=211.09], uv['Squid'/93012, l='MpServer', x=27.63, y=57.09, z=224.53], bil['cadecraft2004'/304, l='MpServer', x=160.90, y=68.62, z=307.42], uv['Squid'/93008, l='MpServer', x=45.06, y=55.38, z=193.34], us['Sheep'/75290, l='MpServer', x=-5.13, y=67.00, z=125.47], uv['Squid'/93009, l='MpServer', x=31.41, y=55.66, z=227.75], us['Sheep'/75291, l='MpServer', x=-3.47, y=67.00, z=124.47], uv['Squid'/89437, l='MpServer', x=26.59, y=55.03, z=231.44], us['Sheep'/75288, l='MpServer', x=3.13, y=72.00, z=118.19], us['Sheep'/75289, l='MpServer', x=-3.53, y=68.00, z=126.78], uv['Squid'/92996, l='MpServer', x=24.81, y=47.00, z=252.72], uv['Squid'/92993, l='MpServer', x=51.84, y=52.34, z=205.19], uh['Bat'/88051, l='MpServer', x=9.31, y=23.10, z=161.69], uv['Squid'/93005, l='MpServer', x=50.41, y=54.91, z=196.88], bil['cadecraft2004'/304, l='MpServer', x=71.55, y=82.97, z=187.90], uv['Squid'/92977, l='MpServer', x=133.22, y=55.94, z=209.31], uv['Squid'/92982, l='MpServer', x=36.88, y=60.08, z=239.38], uv['Squid'/92983, l='MpServer', x=39.13, y=60.34, z=232.50], uh['Bat'/93251, l='MpServer', x=42.00, y=39.10, z=234.59], uv['Squid'/92987, l='MpServer', x=26.72, y=55.36, z=198.97], uv['Squid'/92984, l='MpServer', x=43.72, y=60.25, z=244.69], uv['Squid'/92985, l='MpServer', x=38.09, y=59.31, z=237.44], uv['Squid'/92990, l='MpServer', x=25.81, y=57.27, z=203.06], uh['Bat'/93254, l='MpServer', x=47.03, y=38.00, z=230.66], uh['Bat'/93253, l='MpServer', x=31.66, y=39.39, z=226.34], uv['Squid'/92989, l='MpServer', x=26.47, y=56.34, z=201.41], us['Sheep'/75096, l='MpServer', x=56.06, y=64.00, z=116.06], uh['Bat'/92968, l='MpServer', x=77.30, y=18.02, z=115.74], uh['Bat'/93288, l='MpServer', x=146.41, y=27.70, z=238.28], us['Sheep'/73119, l='MpServer', x=66.50, y=69.00, z=109.50], us['Sheep'/75129, l='MpServer', x=32.09, y=63.00, z=144.84], uh['Bat'/93320, l='MpServer', x=77.25, y=19.00, z=149.25], uh['Bat'/93335, l='MpServer', x=17.50, y=53.00, z=137.50], uh['Bat'/93165, l='MpServer', x=11.72, y=19.92, z=158.69], us['Sheep'/75170, l='MpServer', x=24.44, y=67.00, z=139.50], us['Sheep'/75171, l='MpServer', x=24.50, y=65.00, z=141.50], us['Sheep'/75169, l='MpServer', x=33.09, y=69.00, z=132.03], uh['Bat'/93144, l='MpServer', x=66.50, y=17.50, z=147.21], uh['Bat'/93142, l='MpServer', x=74.03, y=15.53, z=164.39], uh['Bat'/93132, l='MpServer', x=11.74, y=37.85, z=178.55], vn['item.item.reeds'/85238, l='MpServer', x=98.88, y=62.13, z=196.94], uh['Bat'/93121, l='MpServer', x=75.25, y=23.10, z=119.75], uh['Bat'/92881, l='MpServer', x=145.63, y=25.02, z=216.09]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at big.a(SourceFile:302)
	at ayp.b(SourceFile:1935)
	at ayp.e(SourceFile:715)
	at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
	Minecraft Version: 13w41b
	Operating System: Windows Vista (x86) version 6.0
	Java Version: 1.7.0_25, Oracle Corporation
	Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
	Memory: 45266352 bytes (43 MB) / 239726592 bytes (228 MB) up to 1037959168 bytes (989 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	AABB Pool Size: 2004 (112224 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
	Launched Version: 13w41b
	LWJGL: 2.9.0
	OpenGL: Intel Bear Lake B GL version 1.4.0 - Build 7.14.10.1437, Intel
	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: []
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Vec3 Pool Size: 7497 (419832 bytes; 0 MB) allocated, 22 (1232 bytes; 0 MB) used
	Anisotropic Filtering: On (4)