Build [1060] and still no fix for "java.io.IOException: Bad packet id 81" wtf bukkit!

This is Madnesssssssssssssss!!!!!!!!!!!!!!!!!
>19:57:33 [SEVERE] java.io.IOException: Bad packet id 81
>19:57:33 [SEVERE] at net.minecraft.server.Packet.a(Packet.java:73)
>19:57:33 [SEVERE] at net.minecraft.server.NetworkManager.g(NetworkManager.java:149)
>19:57:33 [SEVERE] at net.minecraft.server.NetworkManager.c(NetworkManager.java:259)
>19:57:33 [SEVERE] at net.minecraft.server.NetworkReaderThread.run(SourceFile:84)
>20:38:16 [INFO] /64.79.109.130:58553 lost connection

At the end of the error everytime it says someones ip lost connection

My plugins :
Vanilla , worldedit, worldguard, nocheat, spamhammer

ServerHost : UpstreamGaming.com

any reasons? i dont know java so i have know idea what the hell this means

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

 

Same issue, so far the occurances are timed, similar to....

2011-09-01 06:19:18 [INFO] /94.231.109.47:50964 lost connection
2011-09-01 06:21:40 [INFO] /94.231.101.83:46877 lost connection
2011-09-01 06:22:01 [INFO] /50.23.175.243:44261 lost connection

... which are server status checks by Server listing sites. Any of the Lost connections seem fine.
So I presumeone is being rejected, Not sure which one, but I am fallowing this issue to find the guilty party...

 

I removed Minequery and my server does not time out anymore.