Extreme lag on player disconnect.

CB v.440
Windows 7 64bit
8Gb memory (6 dedicated to MC)

This happens on all versions of CB I have tried.
Whenever someone disconnects from the server it just stalls and lags for a good 4-5+ seconds.
No errors in console.

Whenever I kick or ban someone, it lags for a good 15 seconds or so spams my console with this

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2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.ThreadServerApplication.
run(SourceFile:366)
2011-02-26 21:11:27 [SEVERE] java.lang.IllegalStateException: Failed to remove p
layer. net.minecraft.server.EntityPlayer@dd0b isn't in chunk 17, -8
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.PlayerInstance.b(PlayerI
nstance.java:49)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.PlayerManager.b(PlayerMa
nager.java:101)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.ServerConfigurationManag
er.c(ServerConfigurationManager.java:113)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetServerHandler.a(NetSe
rverHandler.java:556)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetworkManager.a(SourceF
ile:234)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetServerHandler.a(NetSe
rverHandler.java:70)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetworkListenThread.a(So
urceFile:100)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.MinecraftServer.h(Minecr
aftServer.java:338)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.MinecraftServer.run(Mine
craftServer.java:253)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.ThreadServerApplication.
run(SourceFile:366)
2011-02-26 21:11:27 [SEVERE] java.lang.IllegalStateException: Failed to remove p
layer. net.minecraft.server.EntityPlayer@dd0b isn't in chunk 17, -7
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.PlayerInstance.b(PlayerI
nstance.java:49)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.PlayerManager.b(PlayerMa
nager.java:101)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.ServerConfigurationManag
er.c(ServerConfigurationManager.java:113)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetServerHandler.a(NetSe
rverHandler.java:556)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetworkManager.a(SourceF
ile:234)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetServerHandler.a(NetSe
rverHandler.java:70)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.NetworkListenThread.a(So
urceFile:100)
2011-02-26 21:11:27 [SEVERE] at net.minecraft.server.MinecraftServer.h(Minecr
aftServer.java:338)

Plugins I run

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• Essentials(Ban, Home, Tele, Warp, Spawn)
• Permissions
• World Edit
• World Guard
• HeroChat

--- merged: Feb 27, 2011 6:06 AM ---
Removed Essentials, lag stopped. Guess I know what plugin not to use.