I was placing paintings and my game crashed.

Minecraft has crashed!
----------------------

Minecraft has stopped running because it encountered a problem; Rendering entity in world

A full error report has been saved to C:\Users\Jared\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-13_13.49.03-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 8a0bc458 --------
Full report at:
C:\Users\Jared\AppData\Roaming\.minecraft\crash-reports\crash-2012-12-13_13.49.03-client.txt
Please show that file to Mojang, NOT just this screen!

Generated 12/13/12 1:49 PM

– Head –
Stacktrace:
at bbx.a(SourceFile:38)
at bbx.a(SourceFile:12)

– Entity being rendered –
Details:
Entity Type: FallingSand (pw)
Entity ID: 317
Name: Falling Block
Exact location: -14.58, 5.38, -57.16
Block location: World: (-15,5,-58), Chunk: (at 1,0,6 in -1,-4; contains blocks -16,0,-64 to -1,255,-49), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Momentum: 0.00, 0.00, 0.00
Immitating block ID: 0
Immitating block data: 0

– Renderer details –
Details:
Assigned renderer: bbx@26b98a06
Location: 0.00,0.00,0.00 - World: (0,0,0), 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)
Rotation: 0.0
Delta: 0.04788208
Stacktrace:
at bbu.a(SourceFile:195)
at bdr.a(SourceFile:27)
at bdr.a(SourceFile:11)
at bdw.a(SourceFile:103)
at bdw.a(SourceFile:96)
at bav.a(SourceFile:312)
at ban.a(SourceFile:897)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [ays['Howzieky'/271, l='MpServer', x=-225.42, y=5.62, z=153.16]]
Chunk stats: MultiplayerChunkCache: 140
Level seed: 0
Level generator: ID 01 - flat, ver 0. Features enabled: false
Level generator options:
Level spawn location: World: (-746,4,-57), Chunk: (at 6,0,7 in -47,-4; contains blocks -752,0,-64 to -737,255,-49), Region: (-2,-1; contains chunks -64,-32 to -33,-1, blocks -1024,0,-512 to -513,255,-1)
Level time: 6742378 game time, 101648 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: 14 total; [mg['Painting'/272, l='MpServer', x=-225.50, y=4.50, z=150.06], mg['Painting'/272, l='MpServer', x=-225.50, y=4.50, z=150.06], oy['Chicken'/283, l='MpServer', x=-263.56, y=4.00, z=191.41], oy['Chicken'/282, l='MpServer', x=-263.63, y=4.00, z=179.47], oy['Chicken'/281, l='MpServer', x=-258.47, y=4.00, z=147.53], oy['Chicken'/280, l='MpServer', x=-273.39, y=4.00, z=183.44], oy['Chicken'/286, l='MpServer', x=-248.47, y=4.00, z=158.53], oy['Chicken'/285, l='MpServer', x=-245.44, y=4.00, z=149.41], oy['Chicken'/284, l='MpServer', x=-251.41, y=4.00, z=158.41], re['entity.Fireball.name'/295, l='MpServer', x=-228.88, y=17.66, z=90.16], qu['Villager'/296, l='MpServer', x=-233.44, y=4.00, z=107.78], mc['entity.ItemFrame.name'/298, l='MpServer', x=-218.94, y=5.50, z=179.50], mc['entity.ItemFrame.name'/299, l='MpServer', x=-218.94, y=5.50, z=178.50], ays['Howzieky'/271, l='MpServer', x=-225.42, y=5.62, z=153.16]]
Retry entities: 0 total; []
Stacktrace:
at ayp.a(SourceFile:281)
at net.minecraft.client.Minecraft.b(SourceFile:1871)
at net.minecraft.client.Minecraft.run(SourceFile:543)
at java.lang.Thread.run(Unknown Source)

– System Details –
Details:
Minecraft Version: 12w50a
Operating System: Windows Vista (amd64) version 6.0
Java Version: 1.6.0_20, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
Memory: 374377248 bytes (357 MB) / 514523136 bytes (490 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -Xms512m -Xmx1024m
AABB Pool Size: 18931 (1060136 bytes; 1 MB) allocated, 109 (6104 bytes; 0 MB) used
Suspicious classes: [com.pclewis.mcpatcher.MCPatcherUtils, Config], [com.pclewis.mcpatcher.mod.TileSize, TextureUtils, CustomAnimation, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
LWJGL: 2.4.2
OpenGL: Intel(R) G45/G43 Express Chipset GL version 2.1.0 - Build 8.15.10.2302, Intel
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Texture Pack: Just 4 Fun x 32
Profiler Position: N/A (disabled)
Vec3 Pool Size: 959 (53704 bytes; 0 MB) allocated, 86 (4816 bytes; 0 MB) used

java.lang.NullPointerException
at bbx.a(SourceFile:38)
at bbx.a(SourceFile:12)
at bbu.a(SourceFile:195)
at bdr.a(SourceFile:27)
at bdr.a(SourceFile:11)
at bdw.a(SourceFile:103)
at bdw.a(SourceFile:96)
at bav.a(SourceFile:312)
at ban.a(SourceFile:897)
at ban.b(SourceFile:751)
at net.minecraft.client.Minecraft.J(SourceFile:605)
at net.minecraft.client.Minecraft.run(SourceFile:534)
at java.lang.Thread.run(Unknown Source)
— END ERROR REPORT aca61411 ----------