Minecraft Bug whever i join servers or Click items

---- Minecraft Crash Report ----
// I'm sorry, Dave.

Time: 12/9/13 6:46 PM
Description: Ticking entity

java.lang.NullPointerException: Ticking entity
at abp.a(SourceFile:331)
at xj.k(SourceFile:203)
at xl.e(SourceFile:430)
at blc.e(SourceFile:205)
at rh.h(SourceFile:1205)
at xl.h(SourceFile:240)
at bje.h(SourceFile:63)
at afn.a(SourceFile:1368)
at afn.g(SourceFile:1346)
at afn.h(SourceFile:1253)
at azd.o(SourceFile:1532)
at azd.ad(SourceFile:753)
at azd.e(SourceFile:704)
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 abp.a(SourceFile:331)
at xj.k(SourceFile:203)
at xl.e(SourceFile:430)
at blc.e(SourceFile:205)
at rh.h(SourceFile:1205)
at xl.h(SourceFile:240)
at bje.h(SourceFile:63)
at afn.a(SourceFile:1368)
at afn.g(SourceFile:1346)

– Entity being ticked –
Details:
Entity Type: null (bje)
Entity ID: 45839
Entity Name: The_ninja5
Entity's Exact location: -1.01, 144.62, 24.95
Entity's Block location: World: (-2,144,24), Chunk: (at 14,9,8 in -1,1; contains blocks -16,0,16 to -1,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Entity's Momentum: 0.00, -0.08, 0.00
Stacktrace:
at afn.h(SourceFile:1253)

– Affected level –
Details:
Level name: MpServer
All players: 1 total; [bje['The_ninja5'/45839, l='MpServer', x=-1.01, y=144.62, z=24.95]]
Chunk stats: MultiplayerChunkCache: 225, 225
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-5,143,19), Chunk: (at 11,8,3 in -1,1; contains blocks -16,0,16 to -1,255,31), Region: (-1,0; contains chunks -32,0 to -1,31, blocks -512,0,0 to -1,255,511)
Level time: 214405836 game time, 113351016000 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: adventure (ID 2). Hardcore: false. Cheats: false
Forced entities: 48 total; [bld['NoodleRain'/12156953, l='MpServer', x=41.52, y=127.80, z=21.03], rf['entity.ItemFrame.name'/63, l='MpServer', x=-1.50, y=145.50, z=9.06], rf['entity.ItemFrame.name'/62, l='MpServer', x=-3.50, y=145.50, z=9.06], rf['entity.ItemFrame.name'/68, l='MpServer', x=14.94, y=150.50, z=2.50], rf['entity.ItemFrame.name'/69, l='MpServer', x=0.50, y=147.50, z=9.06], rf['entity.ItemFrame.name'/70, l='MpServer', x=14.94, y=139.50, z=28.50], rf['entity.ItemFrame.name'/71, l='MpServer', x=14.06, y=139.50, z=28.50], bld['Bronze_Box'/12161016, l='MpServer', x=8.84, y=143.00, z=18.63], rf['entity.ItemFrame.name'/66, l='MpServer', x=14.94, y=150.50, z=-1.50], bld['NoodleRain'/12156953, l='MpServer', x=44.78, y=136.13, z=22.06], rf['entity.ItemFrame.name'/67, l='MpServer', x=2.50, y=147.50, z=9.06], rf['entity.ItemFrame.name'/76, l='MpServer', x=0.50, y=146.50, z=29.94], rf['entity.ItemFrame.name'/77, l='MpServer', x=11.94, y=147.50, z=18.50], rf['entity.ItemFrame.name'/78, l='MpServer', x=11.94, y=147.50, z=20.50], rf['entity.ItemFrame.name'/79, l='MpServer', x=14.94, y=139.50, z=32.50], rf['entity.ItemFrame.name'/72, l='MpServer', x=12.50, y=139.50, z=31.06], rf['entity.ItemFrame.name'/73, l='MpServer', x=12.50, y=139.50, z=29.94], rf['entity.ItemFrame.name'/74, l='MpServer', x=12.94, y=139.50, z=28.50], rf['entity.ItemFrame.name'/75, l='MpServer', x=2.50, y=146.50, z=29.94], bld['Singh2006'/12099463, l='MpServer', x=2.94, y=143.00, z=27.25], bld['master_K3n'/12118834, l='MpServer', x=6.78, y=143.00, z=19.31], rf['entity.ItemFrame.name'/87, l='MpServer', x=20.06, y=139.50, z=28.50], bld['C12ghosts'/11149859, l='MpServer', x=-22.53, y=139.00, z=42.28], rf['entity.ItemFrame.name'/86, l='MpServer', x=16.06, y=139.50, z=28.50], rf['entity.ItemFrame.name'/81, l='MpServer', x=12.94, y=139.50, z=32.50], rf['entity.ItemFrame.name'/80, l='MpServer', x=14.06, y=139.50, z=32.50], bld['xpieman367x'/12107317, l='MpServer', x=0.25, y=143.00, z=23.00], rf['entity.ItemFrame.name'/93, l='MpServer', x=20.06, y=139.50, z=32.50], rf['entity.ItemFrame.name'/92, l='MpServer', x=18.06, y=139.50, z=32.50], rf['entity.ItemFrame.name'/94, l='MpServer', x=18.94, y=139.50, z=32.50], rf['entity.ItemFrame.name'/89, l='MpServer', x=16.94, y=139.50, z=28.50], rf['entity.ItemFrame.name'/88, l='MpServer', x=18.94, y=139.50, z=28.50], rf['entity.ItemFrame.name'/91, l='MpServer', x=16.94, y=139.50, z=32.50], rf['entity.ItemFrame.name'/90, l='MpServer', x=16.06, y=139.50, z=32.50], bld['Ollie8A'/12110343, l='MpServer', x=34.75, y=142.00, z=36.56], bld['madninga101'/12050704, l='MpServer', x=-2.44, y=143.00, z=22.53], bld['Dillpickle582'/12157610, l='MpServer', x=-2.03, y=143.00, z=11.31], bld['TheLiberal'/12129745, l='MpServer', x=-1.28, y=143.00, z=22.22], bld['abcthepro'/12072780, l='MpServer', x=-5.03, y=150.63, z=-484.31], bld['Fu_Fu_Man'/12157668, l='MpServer', x=2.28, y=153.50, z=29.00], bje['The_ninja5'/45839, l='MpServer', x=-1.01, y=144.62, z=24.95], bld['abcthepro'/12072780, l='MpServer', x=-11.69, y=139.00, z=-507.72], bld['atomcrusher5781'/12077324, l='MpServer', x=13.09, y=147.00, z=1.13], bld['Coblam'/12148333, l='MpServer', x=9.50, y=143.00, z=20.41], bld['abcthepro'/12072780, l='MpServer', x=1.16, y=143.00, z=27.13], bld['newyorkrangers21'/12152440, l='MpServer', x=1.88, y=143.00, z=24.28], bld['eman3003'/12114809, l='MpServer', x=-5.00, y=143.00, z=19.00], bld['googooninja'/12129069, l='MpServer', x=-5.00, y=143.00, z=19.00]]
Retry entities: 0 total; []
Server brand: craftbukkit
Server type: Non-integrated multiplayer server
Stacktrace:
at biz.a(SourceFile:284)
at azd.b(SourceFile:1951)
at azd.e(SourceFile:713)
at net.minecraft.client.main.Main.main(SourceFile:103)

– System Details –
Details:
Minecraft Version: 1.7.2
Operating System: Windows XP (x86) version 5.1
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) Client VM (mixed mode), Oracle Corporation
Memory: 97682160 bytes (93 MB) / 158306304 bytes (150 MB) up to 518979584 bytes (494 MB)
JVM Flags: 3 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx512M -Xmx512m
AABB Pool Size: 42694 (2390864 bytes; 2 MB) allocated, 9 (504 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.7.2
LWJGL: 2.9.0
OpenGL: ATI Radeon HD 3800 Series GL version 3.3.11631 Compatibility Profile Context, 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: 472 (26432 bytes; 0 MB) allocated, 29 (1624 bytes; 0 MB) used
Anisotropic Filtering: Off (1)