Помогите Ошибка сервера или что-то сотворил игрок

2013-02-02 12:19:43 [WARNING] Failed to handle packet for Mordar/95.72.157.91: java.lang.NullPointerException
java.lang.NullPointerException
at net.minecraft.server.v1_4_R1.PlayerList.changeDimension(PlayerList.java:463)
at net.minecraft.server.v1_4_R1.EntityPlayer.b(EntityPlayer.java:345)
at net.minecraft.server.v1_4_R1.BlockEnderPortal.a(BlockEnderPortal.java:47)
at net.minecraft.server.v1_4_R1.Entity.D(Entity.java:749)
at net.minecraft.server.v1_4_R1.Entity.move(Entity.java:701)
at net.minecraft.server.v1_4_R1.EntityLiving.e(EntityLiving.java:1078)
at net.minecraft.server.v1_4_R1.EntityHuman.e(EntityHuman.java:1151)
at net.minecraft.server.v1_4_R1.EntityLiving.c(EntityLiving.java:1324)
at net.minecraft.server.v1_4_R1.EntityHuman.c(EntityHuman.java:308)
at net.minecraft.server.v1_4_R1.EntityLiving.j_(EntityLiving.java:545)
at net.minecraft.server.v1_4_R1.EntityHuman.j_(EntityHuman.java:157)
at net.minecraft.server.v1_4_R1.EntityPlayer.g(EntityPlayer.java:195)
at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:354)
at net.minecraft.server.v1_4_R1.Packet10Flying.handle(SourceFile:136)
at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:115)
at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:585)
at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:481)
at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:416)
at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)