Hopper: java.lang.NullPointerException

java.lang.NullPointerException
	at zh.d(SourceFile:103)
	at bkb.a(SourceFile:143)
	at bkb.a(SourceFile:27)
	at bjr.b(SourceFile:47)
	at bkb.a(SourceFile:43)
	at bkb.a(SourceFile:27)

---- Minecraft Crash Report ----
// I bet Cylons wouldn't have this problem.

Time: 20-9-13 17:32
Description: Rendering entity in world

java.lang.NullPointerException
	at zh.d(SourceFile:103)
	at bkb.a(SourceFile:143)
	at bkb.a(SourceFile:27)
	at bjr.b(SourceFile:47)
	at bkb.a(SourceFile:43)
	at bkb.a(SourceFile:27)
	at bjq.a(SourceFile:215)
	at bjq.a(SourceFile:196)
	at bht.a(SourceFile:52)
	at bhf.b(SourceFile:201)
	at bii.a(SourceFile:977)
	at bii.b(SourceFile:807)
	at awp.aa(SourceFile:754)
	at awp.e(SourceFile:677)
	at net.minecraft.client.main.Main.main(SourceFile:104)


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

-- Head --
Stacktrace:
	at zh.d(SourceFile:103)
	at bkb.a(SourceFile:143)
	at bkb.a(SourceFile:27)
	at bjr.b(SourceFile:47)
	at bkb.a(SourceFile:43)
	at bkb.a(SourceFile:27)

-- Entity being rendered --
Details:
	Entity Type: Item (tt)
	Entity ID: 69181
	Entity Name: ~~ERROR~~ NullPointerException: null
	Entity's Exact location: 79,13, 49,13, 561,88
	Entity's Block location: World: (79,49,561), Chunk: (at 15,3,1 in 4,35; contains blocks 64,0,560 to 79,255,575), Region: (0,1; contains chunks 0,32 to 31,63, blocks 0,0,512 to 511,255,1023)
	Entity's Momentum: 0,00, -0,00, 0,00

-- Renderer details --
Details:
	Assigned renderer: bkb@576a7f71
	Location: 21,14,-26,70,37,58 - World: (21,-27,37), Chunk: (at 5,-2,5 in 1,2; contains blocks 16,0,32 to 31,255,47), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Rotation: 91.40625
	Delta: 0.066838145
Stacktrace:
	at bjq.a(SourceFile:215)
	at bjq.a(SourceFile:196)
	at bht.a(SourceFile:52)
	at bhf.b(SourceFile:201)
	at bii.a(SourceFile:977)

-- Affected level --
Details:
	Level name: MpServer
	All players: 3 total; [bgh['MagicShiny'/58358, l='MpServer', x=57,70, y=75,62, z=524,55], bic['TeenageLive'/3540, l='MpServer', x=30,97, y=65,88, z=519,72], bic['nalim99'/54384, l='MpServer', x=77,00, y=48,00, z=563,91]]
	Chunk stats: MultiplayerChunkCache: 400, 400
	Level seed: 0
	Level generator: ID 02 - largeBiomes, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: World: (-120,64,256), Chunk: (at 8,4,0 in -8,16; contains blocks -128,0,256 to -113,255,271), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
	Level time: 36403 game time, 32378 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: ~~ERROR~~ NullPointerException: null
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Non-integrated multiplayer server
Stacktrace:
	at bgc.a(SourceFile:297)
	at awp.b(SourceFile:1874)
	at awp.e(SourceFile:686)
	at net.minecraft.client.main.Main.main(SourceFile:104)

-- System Details --
Details:
	Minecraft Version: 13w38c
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_15, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 380426416 bytes (362 MB) / 611647488 bytes (583 MB) up to 5726666752 bytes (5461 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx6G
	AABB Pool Size: 2971 (166376 bytes; 0 MB) allocated, 2339 (130984 bytes; 0 MB) used
	IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 103
	Launched Version: 13w38c
	LWJGL: 2.9.0
	OpenGL: AMD Radeon HD 6900 Series GL version 4.2.12002 Compatibility Profile Context 9.12.0.0, ATI Technologies Inc.
	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: 1597 (89432 bytes; 0 MB) allocated, 1597 (89432 bytes; 0 MB) used