Severe Minecraft Crashing

This is an issue that's been occurring several times and I think It's the plugins. I'm using CraftBukkit 1.7.2 Build #3000 (Well it crashes players on every build.) So when 2 or more players join, everyone else's client crashes and I don't want that to happen to our players. It's not my computer (Occurs on hosting on my and my friend's computer), either Bukkit, the plguins, or possibly the configuration of the server. Here's the crash report:

Anyone know a solution to this? This has been going on for weeks. Please help! Thanks!

Different kinds of Crash Logs appear in each crash I believe.

 

This is not Bukkit. This is the Minecraft launcher error.

 

Well It's from my server. When a person joins, everyone else crashes. This doesn't happen on other servers. But It does on my server. Not sure what to do...
---- Minecraft Crash Report ----
// You're mean.

Time: 2/1/14 12:59 PM
Description: Unexpected error

java.lang.IllegalStateException: Player is either on another team or not on any team. Cannot remove from team 'Ghosts'.
at ayr.a(SourceFile:206)
at biv.a(SourceFile:1129)
at hr.a(SourceFile:99)
at hr.a(SourceFile:13)
at ef.a(SourceFile:164)
at biy.e(SourceFile:212)
at azd.o(SourceFile:1281)
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 ayr.a(SourceFile:206)
at biv.a(SourceFile:1129)
at hr.a(SourceFile:99)
at hr.a(SourceFile:13)
at ef.a(SourceFile:164)
at biy.e(SourceFile:212)

-- Affected level --
Details:
Level name: MpServer
All players: 2 total; [bje['Christian1023'/38355, l='MpServer', x=253.43, y=28.82, z=197.31], bld['think_graser10'/38921, l='MpServer', x=246.47, y=27.00, z=197.66]]
Chunk stats: MultiplayerChunkCache: 301, 301
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: World: (-1,160,-1), Chunk: (at 15,10,15 in -1,-1; contains blocks -16,0,-16 to -1,255,-1), Region: (-1,-1; contains chunks -32,-32 to -1,-1, blocks -512,0,-512 to -1,255,-1)
Level time: 4908430 game time, 6706766 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: 70 total; [us['Chicken'/410, l='MpServer', x=239.94, y=67.00, z=136.53], bje['Christian1023'/38355, l='MpServer', x=253.43, y=28.82, z=197.31], rf['entity.ItemFrame.name'/411, l='MpServer', x=262.94, y=49.50, z=236.50], us['Chicken'/34407, l='MpServer', x=296.56, y=67.00, z=127.47], wx['Skeleton'/39094, l='MpServer', x=271.03, y=30.00, z=258.34], us['Chicken'/403, l='MpServer', x=300.53, y=64.00, z=136.41], uq['Bat'/38961, l='MpServer', x=189.43, y=28.60, z=227.04], xc['Zombie'/40782, l='MpServer', x=213.88, y=25.00, z=207.41], wx['Skeleton'/41174, l='MpServer', x=208.50, y=16.00, z=205.50], wx['Skeleton'/41175, l='MpServer', x=208.50, y=16.00, z=204.50], wl['Creeper'/41053, l='MpServer', x=288.50, y=28.00, z=243.50], xc['Zombie'/40046, l='MpServer', x=249.50, y=53.00, z=238.50], us['Chicken'/384, l='MpServer', x=224.20, y=71.00, z=189.47], xc['Zombie'/38937, l='MpServer', x=216.50, y=52.00, z=272.50], xc['Zombie'/39484, l='MpServer', x=203.63, y=21.00, z=256.84], wl['Creeper'/40696, l='MpServer', x=192.97, y=21.00, z=254.53], vw['item.item.egg'/41185, l='MpServer', x=220.94, y=71.13, z=190.25], ut['Cow'/308, l='MpServer', x=175.50, y=67.00, z=271.50], wl['Creeper'/39170, l='MpServer', x=288.50, y=28.00, z=242.50], us['Chicken'/38357, l='MpServer', x=264.53, y=72.00, z=120.34], wx['Skeleton'/41204, l='MpServer', x=315.50, y=33.00, z=184.59], bld['think_graser10'/38921, l='MpServer', x=246.47, y=27.00, z=197.66], wx['Skeleton'/41206, l='MpServer', x=297.00, y=37.00, z=151.47], vb['Sheep'/429, l='MpServer', x=298.19, y=63.00, z=204.72], wy['Slime'/41201, l='MpServer', x=314.99, y=33.00, z=182.78], wl['Creeper'/40687, l='MpServer', x=187.50, y=58.00, z=270.50], wx['Skeleton'/40822, l='MpServer', x=324.50, y=57.00, z=176.50], xc['Zombie'/40684, l='MpServer', x=187.50, y=58.00, z=276.69], wx['Skeleton'/40823, l='MpServer', x=322.50, y=57.00, z=174.31], xc['Zombie'/40685, l='MpServer', x=187.50, y=58.00, z=275.84], ve['Squid'/40945, l='MpServer', x=277.28, y=61.25, z=203.44], ve['Squid'/40947, l='MpServer', x=286.53, y=62.00, z=202.25], ve['Squid'/40949, l='MpServer', x=284.56, y=62.47, z=206.50], us['Chicken'/421, l='MpServer', x=244.56, y=67.00, z=129.96], ve['Squid'/40948, l='MpServer', x=285.38, y=62.00, z=205.25], wz['Spider'/40951, l='MpServer', x=322.50, y=57.00, z=175.84], wz['Spider'/40846, l='MpServer', x=307.50, y=35.00, z=150.50], xc['Zombie'/40226, l='MpServer', x=313.53, y=52.00, z=168.97], va['Pig'/351, l='MpServer', x=211.50, y=73.00, z=131.50], wl['Creeper'/41098, l='MpServer', x=214.50, y=53.00, z=261.50], wl['Creeper'/41097, l='MpServer', x=214.50, y=53.00, z=260.50], xc['Zombie'/39745, l='MpServer', x=291.50, y=35.00, z=151.50], wm['Enderman'/40590, l='MpServer', x=190.50, y=32.00, z=220.47], xc['Zombie'/40859, l='MpServer', x=294.50, y=36.00, z=219.50], wz['Spider'/40449, l='MpServer', x=275.50, y=31.00, z=250.75], xc['Zombie'/39895, l='MpServer', x=308.50, y=42.00, z=213.50], vb['Sheep'/334, l='MpServer', x=198.53, y=63.00, z=253.63], wz['Spider'/41115, l='MpServer', x=183.50, y=54.00, z=252.50], wl['Creeper'/41112, l='MpServer', x=185.50, y=54.00, z=252.50], wl['Creeper'/40977, l='MpServer', x=286.50, y=42.00, z=245.50], wl['Creeper'/41113, l='MpServer', x=180.50, y=54.00, z=253.50], xc['Zombie'/40578, l='MpServer', x=280.50, y=42.00, z=240.50], wx['Skeleton'/40375, l='MpServer', x=209.50, y=38.00, z=128.50], xc['Zombie'/36026, l='MpServer', x=273.31, y=30.00, z=254.31], wx['Skeleton'/40879, l='MpServer', x=201.50, y=24.00, z=262.50], bld['think_graser10'/38921, l='MpServer', x=246.47, y=27.00, z=197.66], wx['Skeleton'/40738, l='MpServer', x=172.50, y=54.00, z=233.50], vw['item.item.egg'/41131, l='MpServer', x=218.50, y=72.13, z=187.03], xc['Zombie'/40994, l='MpServer', x=250.56, y=47.00, z=176.00], xc['Zombie'/39372, l='MpServer', x=250.03, y=24.00, z=183.50], wl['Creeper'/39373, l='MpServer', x=248.53, y=23.00, z=166.78], wl['Creeper'/41269, l='MpServer', x=184.50, y=25.00, z=222.50], wl['Creeper'/41258, l='MpServer', x=240.69, y=20.36, z=253.53], wl['Creeper'/41259, l='MpServer', x=237.50, y=21.00, z=258.50], xc['Zombie'/40486, l='MpServer', x=197.97, y=46.00, z=224.53], us['Chicken'/358, l='MpServer', x=219.38, y=72.00, z=186.41], wl['Creeper'/39259, l='MpServer', x=323.50, y=57.00, z=153.50], wl['Creeper'/40888, l='MpServer', x=283.50, y=34.00, z=240.50], vw['item.item.egg'/40350, l='MpServer', x=284.06, y=64.13, z=138.78], xc['Zombie'/41023, l='MpServer', x=176.50, y=45.00, z=139.50]]
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:718)
at net.minecraft.client.main.Main.main(SourceFile:103)

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.7.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 206046304 bytes (196 MB) / 331874304 bytes (316 MB) up to 954728448 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 1332 (74592 bytes; 0 MB) allocated, 2 (112 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
Launched Version: 1.7.2
LWJGL: 2.9.0
OpenGL: Intel(R) G41 Express Chipset GL version 2.1.0 - Build 8.15.10.2302, Intel
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: 1169 (65464 bytes; 0 MB) allocated, 16 (896 bytes; 0 MB) used
Anisotropic Filtering: Off (1)

 

What plugins are you running? Do any use the team/scoreboard feature?

 

http://prntscr.com/2omrnb <- List of plugins (Some of them have been already removed.)

SOLUTION FOUND: NametagEdit was causing the problem.

EDIT by Moderator: merged posts, please use the edit button instead of double posting.