Crashes randomly: Cause: Unable to render entity in the world.

Report:

---- Minecraft Crash Report ----
// Who set us up the TNT?

Time: 30/04/14 16:34
Description: Rendering entity in world

java.lang.NullPointerException: Rendering entity in world
	at cce.a(SourceFile:79)
	at cce.a(SourceFile:53)
	at cce.a(SourceFile:24)
	at cbt.a(SourceFile:219)
	at cbt.a(SourceFile:199)
	at cbt.a(SourceFile:176)
	at bxs.a(SourceFile:495)
	at bxl.a(SourceFile:1146)
	at bxl.b(SourceFile:935)
	at bjf.ai(SourceFile:828)
	at bjf.f(SourceFile:755)
	at net.minecraft.client.main.Main.main(SourceFile:121)


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

-- Head --
Stacktrace:
	at cce.a(SourceFile:79)
	at cce.a(SourceFile:53)
	at cce.a(SourceFile:24)

-- Entity being rendered --
Details:
	Entity Type: ItemFrame (uh)
	Entity ID: 47
	Entity Name: entity.ItemFrame.name
	Entity's Exact location: 171.97, 56.50, 1202.50
	Entity's Block location: 171.00,56.00,1202.00 - World: (171,56,1202), Chunk: (at 11,3,2 in 10,75; contains blocks 160,0,1200 to 175,255,1215), Region: (0,2; contains chunks 0,64 to 31,95, blocks 0,0,1024 to 511,255,1535)
	Entity's Momentum: 0.00, 0.00, 0.00
	Entity's Rider: ~~ERROR~~ NullPointerException: null
	Entity's Vehicle: ~~ERROR~~ NullPointerException: null

-- Renderer details --
Details:
	Assigned renderer: cce@322cc63b
	Location: 0.49,-2.03,-19.10 - World: (0,-3,-20), Chunk: (at 0,-1,12 in 0,-2; contains blocks 0,0,-32 to 15,255,-17), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
	Rotation: 90.0
	Delta: 0.42319143
Stacktrace:
	at cbt.a(SourceFile:219)
	at cbt.a(SourceFile:199)
	at cbt.a(SourceFile:176)
	at bxs.a(SourceFile:495)
	at bxl.a(SourceFile:1146)

-- Affected level --
Details:
	Level name: MpServer
	All players: 1 total; [bxb['Finnosaurus'/79, l='MpServer', x=171.43, y=58.53, z=1221.62]]
	Chunk stats: MultiplayerChunkCache: 1056, 1056
	Level seed: 0
	Level generator: ID 01 - flat, ver 0. Features enabled: false
	Level generator options: 
	Level spawn location: 189.00,4.00,1164.00 - World: (189,4,1164), Chunk: (at 13,0,12 in 11,72; contains blocks 176,0,1152 to 191,255,1167), Region: (0,2; contains chunks 0,64 to 31,95, blocks 0,0,1024 to 511,255,1535)
	Level time: 71929 game time, 71929 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: 16 total; [aay['Skeleton'/337, l='MpServer', x=164.72, y=56.00, z=1214.78], abg['Spider'/472, l='MpServer', x=205.50, y=56.00, z=1192.50], abg['Spider'/322, l='MpServer', x=206.50, y=56.00, z=1178.50], zy['Creeper'/335, l='MpServer', x=130.97, y=56.00, z=1223.38], zy['Creeper'/332, l='MpServer', x=153.13, y=56.00, z=1237.13], aay['Skeleton'/235, l='MpServer', x=213.25, y=56.00, z=1167.13], aay['Skeleton'/580, l='MpServer', x=165.78, y=56.00, z=1166.28], uh['entity.ItemFrame.name'/47, l='MpServer', x=171.97, y=56.50, z=1202.50], abl['Zombie'/981, l='MpServer', x=96.59, y=56.00, z=1262.13], uh['entity.ItemFrame.name'/50, l='MpServer', x=172.50, y=56.50, z=1201.97], uh['entity.ItemFrame.name'/49, l='MpServer', x=173.03, y=56.50, z=1202.50], uh['entity.ItemFrame.name'/48, l='MpServer', x=172.50, y=56.50, z=1203.03], zy['Creeper'/974, l='MpServer', x=101.50, y=56.00, z=1255.50], bxb['Finnosaurus'/79, l='MpServer', x=171.43, y=58.53, z=1221.62], aay['Skeleton'/246, l='MpServer', x=223.84, y=56.00, z=1256.13], abl['Zombie'/725, l='MpServer', x=236.81, y=56.00, z=1251.25]]
	Retry entities: 0 total; []
	Server brand: vanilla
	Server type: Integrated singleplayer server
Stacktrace:
	at buw.a(SourceFile:308)
	at bjf.b(SourceFile:2069)
	at bjf.f(SourceFile:764)
	at net.minecraft.client.main.Main.main(SourceFile:121)

-- System Details --
Details:
	Minecraft Version: 14w18a
	Operating System: Windows 7 (amd64) version 6.1
	Java Version: 1.7.0_55, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 375411800 bytes (358 MB) / 567279616 bytes (541 MB) up to 954728448 bytes (910 MB)
	JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	Launched Version: 14w18a
	LWJGL: 2.9.1
	OpenGL: ATI Radeon HD 5400 Series GL version 4.2.12217 Compatibility Profile Context 12.104.0.0, ATI Technologies Inc.
	GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Anisotropic filtering is supported and maximum anisotropy is 16.
Shaders are available because OpenGL 2.1 is supported.

	Is Modded: Probably not. Jar signature remains and client brand is untouched.
	Type: Client (map_client.txt)
	Resource Packs: [Animated Minecraft]
	Current Language: English (US)
	Profiler Position: N/A (disabled)
	Anisotropic Filtering: Off (1)

What I expected to happen was...:
Nothing really, it just happens randomly.

What actually happened was...:
The screen went completely one solid colour and then it crashed.

Steps to Reproduce:
No idea. It's just random.