I don't really understand java very well but this appears on my server log every 2 minutes or so. 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.PlayerInstance.<init>(PlayerInstance.java:23) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:114) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:330) 16.09 09:15:44 [Server] SEVERE at java.lang.reflect.Method.invoke(Method.java:601) 16.09 09:15:44 [Server] SEVERE at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 16.09 09:15:44 [Server] SEVERE at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) 16.09 09:15:44 [Server] SEVERE at com.gmail.nossr50.listeners.WorldListener.onChunkLoad(WorldListener.java:36) 16.09 09:15:44 [Server] SEVERE at com.gmail.nossr50.util.blockmeta.HashChunkletManager.chunkLoaded(HashChunkletManager.java:30) 16.09 09:15:44 [Server] SEVERE at com.gmail.nossr50.util.blockmeta.HashChunkletManager.deserializeChunkletStore(HashChunkletManager.java:210) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readObject(ObjectInputStream.java:369) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readObject0(ObjectInputStream.java:1347) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readSerialData(ObjectInputStream.java:1888) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.defaultReadFields(ObjectInputStream.java:1964) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readObject0(ObjectInputStream.java:1341) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readArray(ObjectInputStream.java:1685) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readObject0(ObjectInputStream.java:1341) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readArray(ObjectInputStream.java:1685) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readObject0(ObjectInputStream.java:1341) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readArray(ObjectInputStream.java:1642) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readClassDesc(ObjectInputStream.java:1508) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readHandle(ObjectInputStream.java:1449) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream$BlockDataInputStream.readInt(ObjectInputStream.java:2791) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2298) 16.09 09:15:44 [Server] SEVERE java.io.EOFException 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.ThreadServerApplication.run(SourceFile:539) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:406) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:474) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:212) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:581) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.DedicatedServerConnection.b(SourceFile:29) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.DedicatedServerConnectionThread.a(DedicatedServerConnectionThread.java:44) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.NetLoginHandler.c(NetLoginHandler.java:41) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.NetLoginHandler.d(NetLoginHandler.java:121) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.ServerConfigurationManagerAbstract.a(ServerConfigurationManagerAbstract.java:92) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.ServerConfigurationManagerAbstract.c(ServerConfigurationManagerAbstract.java:172) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.ServerConfigurationManagerAbstract.a(ServerConfigurationManagerAbstract.java:123) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.PlayerManager.addPlayer(PlayerManager.java:101) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.PlayerManager.a(PlayerManager.java:66) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.PlayerInstance.<init>(PlayerInstance.java:23) 16.09 09:15:44 [Server] SEVERE at net.minecraft.server.ChunkProviderServer.getChunkAt(ChunkProviderServer.java:114) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) 16.09 09:15:44 [Server] SEVERE at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:330) 16.09 09:15:44 [Server] SEVERE at java.lang.reflect.Method.invoke(Method.java:601) 16.09 09:15:44 [Server] SEVERE at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 16.09 09:15:44 [Server] SEVERE at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) 16.09 09:15:44 [Server] SEVERE at com.gmail.nossr50.listeners.WorldListener.onChunkLoad(WorldListener.java:36) 16.09 09:15:44 [Server] SEVERE at com.gmail.nossr50.util.blockmeta.HashChunkletManager.chunkLoaded(HashChunkletManager.java:30) 16.09 09:15:44 [Server] SEVERE at com.gmail.nossr50.util.blockmeta.HashChunkletManager.deserializeChunkletStore(HashChunkletManager.java:209) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.<init>(ObjectInputStream.java:298) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream.readStreamHeader(ObjectInputStream.java:798) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2767) 16.09 09:15:44 [Server] SEVERE at java.ibjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2298) 16.09 09:15:44 [Server] SEVERE java.io.EOFException