When running my Bukkit server I get an error saying "23:15:07 [SEVERE] at net.minecraft.server.World.getTypeId(World.java:161) 23:15:07 [SEVERE] at net.minecraft.server.Entity.move(Entity.java:561) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.a(EntityLiving.java :589) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.u(EntityLiving.java :711) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.u(EntityMonster.ja va:30) 23:15:07 [SEVERE] at net.minecraft.server.EntityZombie.u(EntityZombie.java :34) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.o_(EntityLiving.jav a:231) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.o_(EntityMonster.j ava:34) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1071) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:07 [INFO] net.minecraft.server.Chunk 23:15:07 [SEVERE] java.lang.Throwable 23:15:07 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:121) 23:15:07 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:07 [SEVERE] at net.minecraft.server.World.getTypeId(World.java:161) 23:15:07 [SEVERE] at net.minecraft.server.Entity.move(Entity.java:561) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.a(EntityLiving.java :589) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.u(EntityLiving.java :711) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.u(EntityMonster.ja va:30) 23:15:07 [SEVERE] at net.minecraft.server.EntityZombie.u(EntityZombie.java :34) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.o_(EntityLiving.jav a:231) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.o_(EntityMonster.j ava:34) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1071) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:07 [SEVERE] java.lang.Throwable 23:15:07 [SEVERE] at org.bukkit.craftbukkit.util.LongHashtable.get(LongHas htable.java:32) 23:15:07 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:113) 23:15:07 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:07 [SEVERE] at net.minecraft.server.World.b(World.java:1848) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.u(EntityLiving.java :712) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.u(EntityMonster.ja va:30) 23:15:07 [SEVERE] at net.minecraft.server.EntityZombie.u(EntityZombie.java :34) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.o_(EntityLiving.jav a:231) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.o_(EntityMonster.j ava:34) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1071) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:07 [INFO] net.minecraft.server.Chunk 23:15:07 [SEVERE] java.lang.Throwable 23:15:07 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:121) 23:15:07 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:07 [SEVERE] at net.minecraft.server.World.b(World.java:1848) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.u(EntityLiving.java :712) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.u(EntityMonster.ja va:30) 23:15:07 [SEVERE] at net.minecraft.server.EntityZombie.u(EntityZombie.java :34) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.o_(EntityLiving.jav a:231) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.o_(EntityMonster.j ava:34) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1071) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:07 [SEVERE] java.lang.Throwable 23:15:07 [SEVERE] at org.bukkit.craftbukkit.util.LongHashtable.get(LongHas htable.java:32) 23:15:07 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:113) 23:15:07 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1106) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:07 [INFO] net.minecraft.server.Chunk 23:15:07 [SEVERE] java.lang.Throwable 23:15:07 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:121) 23:15:07 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1106) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Wrong location! net.minecraft.server.EntityZombie@16b 23:15:07 [INFO] -1055.300000011921,-850.4124263029724(-66,-54) vs -67,-45 23:15:07 [SEVERE] java.lang.Exception: Stack trace 23:15:07 [SEVERE] at java.lang.Thread.dumpStack(Unknown Source) 23:15:07 [SEVERE] at net.minecraft.server.Chunk.a(Chunk.java:367) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1106) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:07 [SEVERE] java.lang.Throwable 23:15:07 [SEVERE] at org.bukkit.craftbukkit.util.LongHashtable.get(LongHas htable.java:32) 23:15:07 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:113) 23:15:07 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:07 [SEVERE] at net.minecraft.server.World.b(World.java:1848) 23:15:07 [SEVERE] at net.minecraft.server.World.getEntities(World.java:884 ) 23:15:07 [SEVERE] at net.minecraft.server.Entity.move(Entity.java:392) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.a(EntityLiving.java :589) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.u(EntityLiving.java :711) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.u(EntityMonster.ja va:30) 23:15:07 [SEVERE] at net.minecraft.server.EntityZombie.u(EntityZombie.java :34) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.o_(EntityLiving.jav a:231) 23:15:07 [SEVERE] at net.minecraft.server.EntityMonster.o_(EntityMonster.j ava:34) 23:15:07 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1071) 23:15:07 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:07 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:07 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:07 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:07 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:07 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:07 [INFO] net.minecraft.server.Chunk 23:15:07 [SEVERE] java.lang.Throwable 23:15:07 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:121) 23:15:07 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:07 [SEVERE] at net.minecraft.server.World.b(World.java:1848) 23:15:07 [SEVERE] at net.minecraft.server.World.getEntities(World.java:884 ) 23:15:07 [SEVERE] at net.minecraft.server.Entity.move(Entity.java:392) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.a(EntityLiving.java :589) 23:15:07 [SEVERE] at net.minecraft.server.EntityLiving.u(EntityLiving.java :711) 23:15:08 [SEVERE] at net.minecraft.server.EntityMonster.u(EntityMonster.ja va:30) 23:15:08 [SEVERE] at net.minecraft.server.EntityZombie.u(EntityZombie.java :34) 23:15:08 [SEVERE] at net.minecraft.server.EntityLiving.o_(EntityLiving.jav a:231) 23:15:08 [SEVERE] at net.minecraft.server.EntityMonster.o_(EntityMonster.j ava:34) 23:15:08 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1071) 23:15:08 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:08 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:08 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:08 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:08 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:08 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:08 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:08 [SEVERE] java.lang.Throwable 23:15:08 [SEVERE] at org.bukkit.craftbukkit.util.LongHashtable.get(LongHas htable.java:32) 23:15:08 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:113) 23:15:08 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:08 [SEVERE] at net.minecraft.server.World.getTypeId(World.java:161) 23:15:08 [SEVERE] at net.minecraft.server.Entity.move(Entity.java:561) 23:15:08 [SEVERE] at net.minecraft.server.EntityLiving.a(EntityLiving.java :589) 23:15:08 [SEVERE] at net.minecraft.server.EntityLiving.u(EntityLiving.java :711) 23:15:08 [SEVERE] at net.minecraft.server.EntityMonster.u(EntityMonster.ja va:30) 23:15:08 [SEVERE] at net.minecraft.server.EntityZombie.u(EntityZombie.java :34) 23:15:08 [SEVERE] at net.minecraft.server.EntityLiving.o_(EntityLiving.jav a:231) 23:15:08 [SEVERE] at net.minecraft.server.EntityMonster.o_(EntityMonster.j ava:34) 23:15:08 [SEVERE] at net.minecraft.server.World.entityJoinedWorld(World.ja va:1071) 23:15:08 [SEVERE] at net.minecraft.server.WorldServer.entityJoinedWorld(Wo rldServer.java:56) 23:15:08 [SEVERE] at net.minecraft.server.World.playerJoinedWorld(World.ja va:1053) 23:15:08 [SEVERE] at net.minecraft.server.World.cleanUp(World.java:1030) 23:15:08 [SEVERE] at net.minecraft.server.MinecraftServer.h(MinecraftServe r.java:397) 23:15:08 [SEVERE] at net.minecraft.server.MinecraftServer.run(MinecraftSer ver.java:311) 23:15:08 [SEVERE] at net.minecraft.server.ThreadServerApplication.run(Sour ceFile:422) 23:15:08 [INFO] Chunk (-67, -45) stored at (-66, -54) 23:15:08 [INFO] net.minecraft.server.Chunk 23:15:08 [SEVERE] java.lang.Throwable 23:15:08 [SEVERE] at net.minecraft.server.ChunkProviderServer.getOrCreateC hunk(ChunkProviderServer.java:121) 23:15:08 [SEVERE] at net.minecraft.server.World.getChunkAt(World.java:218) 23:15:08 [SEVERE] at net.minecraft.server.World.getTypeId(World.java:161) >" And much much more random things? What does this mean and how can I fix it? Please Help!