My minecraft randomly crashes while on a server, no matter with regular launcher, magic launcher, no mods, optifine, it still crashes randomly. I tried resetting my .minecraft, and it worked for a while, then stopped working.

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

Time: 7/11/13 9:20 PM
Description: Exception in world tick

java.lang.IllegalStateException: Player is either on another team or not on any team. Cannot remove from team 'hbr10'.
at atg.b(SourceFile:202)
at bct.a(SourceFile:1164)
at ft.a(SourceFile:99)
at cn.b(SourceFile:354)
at bct.e(SourceFile:98)
at bda.b(SourceFile:60)
at ats.k(SourceFile:1386)
at ats.S(SourceFile:663)
at ats.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

– Head –
Stacktrace:
at atg.b(SourceFile:202)
at bct.a(SourceFile:1164)
at ft.a(SourceFile:99)
at cn.b(SourceFile:354)
at bct.e(SourceFile:98)

– Affected level –
Details:
Level name: MpServer
All players: 10 total; [bdf['Kamren35'/1063345, l='MpServer', x=29.73, y=88.62, z=-430.35], bev['Speedster199500'/664541, l='MpServer', x=72.34, y=86.50, z=-409.50], bev['nickydoo'/548208, l='MpServer', x=46.19, y=87.00, z=-439.75], bev['tomtom41897'/352811, l='MpServer', x=70.44, y=87.00, z=-442.03], bev['supchuck663'/161807, l='MpServer', x=38.75, y=58.00, z=-450.03], bev['_Pyrologist_'/49693, l='MpServer', x=56.44, y=70.00, z=-458.75], bev['DonaldDuck136'/1087124, l='MpServer', x=32.31, y=76.00, z=-452.69], bev['123derekb'/975929, l='MpServer', x=43.34, y=58.00, z=-449.56], bev['hunterkent2000'/575525, l='MpServer', x=31.34, y=73.00, z=-452.50], bev['shellgoblin'/688958, l='MpServer', x=67.56, y=87.00, z=-440.41]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-694,78,-482), Chunk: (at 10,4,14 in -44,-31; contains blocks -704,0,-496 to -689,255,-481), Region: (-2,-1; contains chunks -64,-32 to -33,-1, blocks -1024,0,-512 to -513,255,-1)
Level time: 170731566 game time, 172289004 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: 53 total; [bdf['Kamren35'/1063345, l='MpServer', x=29.73, y=88.62, z=-430.35], bev['T34M_UN1C0RN5'/1036537, l='MpServer', x=33.50, y=79.00, z=-479.72], rp['Chicken'/1118059, l='MpServer', x=77.47, y=88.00, z=-399.34], bev['boodis11'/992597, l='MpServer', x=79.41, y=86.50, z=-416.22], bev['tomtom41897'/352811, l='MpServer', x=75.29, y=86.50, z=-415.61], bev['TheMostEpicMan'/1063026, l='MpServer', x=68.25, y=88.00, z=-396.41], bev['TheMostEpicMan'/1063026, l='MpServer', x=77.38, y=88.00, z=-393.97], bev['Speedster199500'/664541, l='MpServer', x=72.34, y=86.50, z=-409.50], bev['nickydoo'/548208, l='MpServer', x=46.19, y=87.00, z=-439.75], sr['item.tile.sandStone.default'/1186053, l='MpServer', x=30.13, y=73.52, z=-453.30], rp['Chicken'/1090965, l='MpServer', x=74.72, y=88.00, z=-401.19], bev['tomtom41897'/352811, l='MpServer', x=70.44, y=87.00, z=-442.03], rp['Chicken'/1090497, l='MpServer', x=74.72, y=88.00, z=-402.16], bev['TheMostEpicMan'/1063026, l='MpServer', x=74.31, y=88.00, z=-400.69], bev['hunterkent2000'/575525, l='MpServer', x=31.34, y=73.00, z=-452.50], bev['shellgoblin'/688958, l='MpServer', x=67.56, y=87.00, z=-440.41], bev['hunterkent2000'/575525, l='MpServer', x=41.41, y=58.00, z=-481.38], bev['hunterkent2000'/575525, l='MpServer', x=31.34, y=73.00, z=-452.50], bev['123derekb'/975929, l='MpServer', x=43.34, y=58.00, z=-449.56], bev['_Pyrologist_'/49693, l='MpServer', x=56.44, y=70.00, z=-458.75], bev['DonaldDuck136'/1087124, l='MpServer', x=32.31, y=76.00, z=-452.69], bev['supchuck663'/161807, l='MpServer', x=38.75, y=58.00, z=-450.03], sr['item.tile.oreGold'/1185975, l='MpServer', x=57.42, y=72.20, z=-458.13], bev['shellgoblin'/688958, l='MpServer', x=59.33, y=87.35, z=-425.57], sr['item.tile.sandStone.default'/1185343, l='MpServer', x=57.78, y=70.13, z=-459.78], bev['123derekb'/975929, l='MpServer', x=56.47, y=58.00, z=-470.69], bev['_Pyrologist_'/49693, l='MpServer', x=24.44, y=84.60, z=-453.31], bev['shellgoblin'/688958, l='MpServer', x=41.66, y=67.00, z=-478.28], bev['supchuck663'/161807, l='MpServer', x=41.22, y=58.00, z=-452.28], bev['supchuck663'/161807, l='MpServer', x=44.16, y=87.00, z=-367.60], bev['hunterkent2000'/575525, l='MpServer', x=42.65, y=58.00, z=-480.34], bev['kopekj'/1005968, l='MpServer', x=15.84, y=87.00, z=-428.06], bev['nickydoo'/548208, l='MpServer', x=46.19, y=87.00, z=-439.75], bev['DonaldDuck136'/1087124, l='MpServer', x=32.31, y=76.00, z=-452.69], bev['hunterkent2000'/575525, l='MpServer', x=47.34, y=64.94, z=-474.49], bev['TheMostEpicMan'/1063026, l='MpServer', x=79.25, y=88.00, z=-391.91], bev['Speedster199500'/664541, l='MpServer', x=72.34, y=86.50, z=-409.50], bev['Cloudefer'/850776, l='MpServer', x=70.41, y=87.00, z=-443.38], sr['item.tile.sandStone.default'/1185877, l='MpServer', x=29.77, y=73.13, z=-452.13], rp['Chicken'/1091307, l='MpServer', x=73.63, y=88.00, z=-401.41], bev['123derekb'/975929, l='MpServer', x=43.34, y=58.00, z=-449.56], bev['shellgoblin'/688958, l='MpServer', x=47.47, y=67.22, z=-466.13], bev['tomtom41897'/352811, l='MpServer', x=57.59, y=67.00, z=-468.13], bev['123derekb'/975929, l='MpServer', x=55.28, y=58.00, z=-469.31], bev['123derekb'/975929, l='MpServer', x=49.31, y=58.00, z=-470.69], bev['tomtom41897'/352811, l='MpServer', x=70.44, y=87.00, z=-442.03], bev['shellgoblin'/688958, l='MpServer', x=38.28, y=66.66, z=-470.29], bev['supchuck663'/161807, l='MpServer', x=38.75, y=58.00, z=-450.03], rp['Chicken'/1086308, l='MpServer', x=73.81, y=88.00, z=-400.44], bev['shellgoblin'/688958, l='MpServer', x=67.56, y=87.00, z=-440.41], rp['Chicken'/1110020, l='MpServer', x=78.41, y=89.00, z=-401.84], rp['Chicken'/1110022, l='MpServer', x=72.53, y=88.00, z=-398.81], bev['_Pyrologist_'/49693, l='MpServer', x=56.44, y=70.00, z=-458.75]]
Retry entities: 0 total; []
Server brand: > B u n g e e C o r d ( g i t - B u n g e e C o r d - P r o x y - 1 . 6 . 1 - S N A P S H O T - " 9 a d c b 0 5 " - 5 8 7 )
Server type: Non-integrated multiplayer server
Stacktrace:
at bda.a(SourceFile:284)
at ats.k(SourceFile:1393)
at ats.S(SourceFile:663)
at ats.d(SourceFile:619)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at magic.launcher.Launcher.main(Unknown Source)

– Affected level –
Details:
Level name: MpServer
All players: 10 total; [bdf['Kamren35'/1063345, l='MpServer', x=29.73, y=88.62, z=-430.35], bev['Speedster199500'/664541, l='MpServer', x=72.34, y=86.50, z=-409.50], bev['nickydoo'/548208, l='MpServer', x=46.19, y=87.00, z=-439.75], bev['tomtom41897'/352811, l='MpServer', x=70.44, y=87.00, z=-442.03], bev['supchuck663'/161807, l='MpServer', x=38.75, y=58.00, z=-450.03], bev['_Pyrologist_'/49693, l='MpServer', x=56.44, y=70.00, z=-458.75], bev['DonaldDuck136'/1087124, l='MpServer', x=32.31, y=76.00, z=-452.69], bev['123derekb'/975929, l='MpServer', x=43.34, y=58.00, z=-449.56], bev['hunterkent2000'/575525, l='MpServer', x=31.34, y=73.00, z=-452.50], bev['shellgoblin'/688958, l='MpServer', x=67.56, y=87.00, z=-440.41]]
Chunk stats: MultiplayerChunkCache: 441
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-694,78,-482), Chunk: (at 10,4,14 in -44,-31; contains blocks -704,0,-496 to -689,255,-481), Region: (-2,-1; contains chunks -64,-32 to -33,-1, blocks -1024,0,-512 to -513,255,-1)
Level time: 170731566 game time, 172289004 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: 53 total; [bdf['Kamren35'/1063345, l='MpServer', x=29.73, y=88.62, z=-430.35], bev['T34M_UN1C0RN5'/1036537, l='MpServer', x=33.50, y=79.00, z=-479.72], rp['Chicken'/1118059, l='MpServer', x=77.47, y=88.00, z=-399.34], bev['boodis11'/992597, l='MpServer', x=79.41, y=86.50, z=-416.22], bev['tomtom41897'/352811, l='MpServer', x=75.29, y=86.50, z=-415.61], bev['TheMostEpicMan'/1063026, l='MpServer', x=68.25, y=88.00, z=-396.41], bev['TheMostEpicMan'/1063026, l='MpServer', x=77.38, y=88.00, z=-393.97], bev['Speedster199500'/664541, l='MpServer', x=72.34, y=86.50, z=-409.50], bev['nickydoo'/548208, l='MpServer', x=46.19, y=87.00, z=-439.75], sr['item.tile.sandStone.default'/1186053, l='MpServer', x=30.13, y=73.52, z=-453.30], rp['Chicken'/1090965, l='MpServer', x=74.72, y=88.00, z=-401.19], bev['tomtom41897'/352811, l='MpServer', x=70.44, y=87.00, z=-442.03], rp['Chicken'/1090497, l='MpServer', x=74.72, y=88.00, z=-402.16], bev['TheMostEpicMan'/1063026, l='MpServer', x=74.31, y=88.00, z=-400.69], bev['hunterkent2000'/575525, l='MpServer', x=31.34, y=73.00, z=-452.50], bev['shellgoblin'/688958, l='MpServer', x=67.56, y=87.00, z=-440.41], bev['hunterkent2000'/575525, l='MpServer', x=41.41, y=58.00, z=-481.38], bev['hunterkent2000'/575525, l='MpServer', x=31.34, y=73.00, z=-452.50], bev['123derekb'/975929, l='MpServer', x=43.34, y=58.00, z=-449.56], bev['_Pyrologist_'/49693, l='MpServer', x=56.44, y=70.00, z=-458.75], bev['DonaldDuck136'/1087124, l='MpServer', x=32.31, y=76.00, z=-452.69], bev['supchuck663'/161807, l='MpServer', x=38.75, y=58.00, z=-450.03], sr['item.tile.oreGold'/1185975, l='MpServer', x=57.42, y=72.20, z=-458.13], bev['shellgoblin'/688958, l='MpServer', x=59.33, y=87.35, z=-425.57], sr['item.tile.sandStone.default'/1185343, l='MpServer', x=57.78, y=70.13, z=-459.78], bev['123derekb'/975929, l='MpServer', x=56.47, y=58.00, z=-470.69], bev['_Pyrologist_'/49693, l='MpServer', x=24.44, y=84.60, z=-453.31], bev['shellgoblin'/688958, l='MpServer', x=41.66, y=67.00, z=-478.28], bev['supchuck663'/161807, l='MpServer', x=41.22, y=58.00, z=-452.28], bev['supchuck663'/161807, l='MpServer', x=44.16, y=87.00, z=-367.60], bev['hunterkent2000'/575525, l='MpServer', x=42.65, y=58.00, z=-480.34], bev['kopekj'/1005968, l='MpServer', x=15.84, y=87.00, z=-428.06], bev['nickydoo'/548208, l='MpServer', x=46.19, y=87.00, z=-439.75], bev['DonaldDuck136'/1087124, l='MpServer', x=32.31, y=76.00, z=-452.69], bev['hunterkent2000'/575525, l='MpServer', x=47.34, y=64.94, z=-474.49], bev['TheMostEpicMan'/1063026, l='MpServer', x=79.25, y=88.00, z=-391.91], bev['Speedster199500'/664541, l='MpServer', x=72.34, y=86.50, z=-409.50], bev['Cloudefer'/850776, l='MpServer', x=70.41, y=87.00, z=-443.38], sr['item.tile.sandStone.default'/1185877, l='MpServer', x=29.77, y=73.13, z=-452.13], rp['Chicken'/1091307, l='MpServer', x=73.63, y=88.00, z=-401.41], bev['123derekb'/975929, l='MpServer', x=43.34, y=58.00, z=-449.56], bev['shellgoblin'/688958, l='MpServer', x=47.47, y=67.22, z=-466.13], bev['tomtom41897'/352811, l='MpServer', x=57.59, y=67.00, z=-468.13], bev['123derekb'/975929, l='MpServer', x=55.28, y=58.00, z=-469.31], bev['123derekb'/975929, l='MpServer', x=49.31, y=58.00, z=-470.69], bev['tomtom41897'/352811, l='MpServer', x=70.44, y=87.00, z=-442.03], bev['shellgoblin'/688958, l='MpServer', x=38.28, y=66.66, z=-470.29], bev['supchuck663'/161807, l='MpServer', x=38.75, y=58.00, z=-450.03], rp['Chicken'/1086308, l='MpServer', x=73.81, y=88.00, z=-400.44], bev['shellgoblin'/688958, l='MpServer', x=67.56, y=87.00, z=-440.41], rp['Chicken'/1110020, l='MpServer', x=78.41, y=89.00, z=-401.84], rp['Chicken'/1110022, l='MpServer', x=72.53, y=88.00, z=-398.81], bev['_Pyrologist_'/49693, l='MpServer', x=56.44, y=70.00, z=-458.75]]
Retry entities: 0 total; []
Server brand: > B u n g e e C o r d ( g i t - B u n g e e C o r d - P r o x y - 1 . 6 . 1 - S N A P S H O T - " 9 a d c b 0 5 " - 5 8 7 )
Server type: Non-integrated multiplayer server

– System Details –
Details:
Minecraft Version: 1.6.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 1565499912 bytes (1492 MB) / 2102460416 bytes (2005 MB) up to 2102460416 bytes (2005 MB)
JVM Flags: 2 total; -Xms2048m -Xmx2048m
AABB Pool Size: 2118 (118608 bytes; 0 MB) allocated, 156 (8736 bytes; 0 MB) used
Suspicious classes: IWrUpdater, Config, WrUpdaterSmooth, ...]
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
Launched Version: 1.6.2
LWJGL: 2.9.0
OpenGL: AMD Radeon HD 6550D GL version 4.2.12337 Compatibility Profile Context 13.101.0.0, ATI Technologies Inc.
Is Modded: Very likely; Jar signature invalidated
Type: Client (map_client.txt)
Resource Pack: Faithful Edit.zip
Current Language: English (US)
Profiler Position: N/A (disabled)
Vec3 Pool Size: 172 (9632 bytes; 0 MB) allocated, 41 (2296 bytes; 0 MB) used

Please fix this, other people on the server and other servers are also experiencing random crashes.