trace

2012-12-02 09:10:36 [INFO] [STDERR] net.minecraft.src.ReportedException: Ticking memory connection
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.NetworkListenThread.networkTick(NetworkListenThread.java:62)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.IntegratedServerListenThread.networkTick(IntegratedServerListenThread.java:111)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:691)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:587)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.IntegratedServer.tick(IntegratedServer.java:110)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:494)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.ThreadMinecraftServer.run(ThreadMinecraftServer.java:17)
2012-12-02 09:10:36 [INFO] [STDERR] Caused by: java.lang.IllegalStateException: Entity is already tracked!
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityTracker.addEntityToTracker(EntityTracker.java:161)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityTracker.addEntityToTracker(EntityTracker.java:149)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityTracker.addEntityToTracker(EntityTracker.java:35)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.WorldManager.obtainEntitySkin(WorldManager.java:30)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.World.obtainEntitySkin(World.java:1517)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.WorldServer.obtainEntitySkin(WorldServer.java:822)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.World.spawnEntityInWorld(World.java:1505)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.ServerConfigurationManager.transferEntityToWorld(ServerConfigurationManager.java:456)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.ServerConfigurationManager.transferPlayerToDimension(ServerConfigurationManager.java:385)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.ServerConfigurationManager.transferPlayerToDimension(ServerConfigurationManager.java:372)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityPlayerMP.travelToDimension(EntityPlayerMP.java:363)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.Entity.onEntityUpdate(Entity.java:447)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityLiving.onEntityUpdate(EntityLiving.java:524)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.Entity.onUpdate(Entity.java:398)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityLiving.onUpdate(EntityLiving.java:743)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityPlayer.onUpdate(EntityPlayer.java:279)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.EntityPlayerMP.onUpdateEntity(EntityPlayerMP.java:217)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.NetServerHandler.handleFlying(NetServerHandler.java:256)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.Packet10Flying.processPacket(Packet10Flying.java:51)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.MemoryConnection.processReadPackets(MemoryConnection.java:79)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.NetServerHandler.networkTick(NetServerHandler.java:82)
2012-12-02 09:10:36 [INFO] [STDERR]     at net.minecraft.src.NetworkListenThread.networkTick(NetworkListenThread.java:55)
2012-12-02 09:10:36 [INFO] [STDERR]     ... 6 more
2012-12-02 09:10:37 [INFO] [ForgeModLoader] Unloading dimension 0
2012-12-02 09:10:37 [INFO] [ForgeModLoader] Unloading dimension 1