Crash that I cant figure out.. please help :)

this all started yesterday on one of my nether maps. So i removed that world and all was well, then it started happening on another nether map. I removed it and all was well.. now its happening on my main survival map, which i ran Chunkster against, but dont think it fixed anything..

This has been causing my major grief the last couple days. Any ideas on how to fix it?

Craftbukkit 1337

Code:

2011-11-06 08:53:59 [INFO] Disconnecting Garnetty [/24.60.88.133:49345]: Internal server error
2011-11-06 08:53:59 [WARNING] Failed to handle packet: java.lang.NullPointerException
java.lang.NullPointerException
        at net.minecraft.server.Packet21PickupSpawn.<init>(SourceFile:22)
        at net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:240)
        at net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:192)
        at net.minecraft.server.EntityTracker.track(EntityTracker.java:33)
        at net.minecraft.server.WorldManager.a(WorldManager.java:16)
        at net.minecraft.server.World.c(World.java:881)
        at net.minecraft.server.WorldServer.c(WorldServer.java:161)
        at net.minecraft.server.World.addEntity(World.java:874)
        at net.minecraft.server.World.addEntity(World.java:826)
        at net.minecraft.server.ServerConfigurationManager.c(ServerConfigurationManager.java:138)
        at net.minecraft.server.NetLoginHandler.b(NetLoginHandler.java:121)
        at net.minecraft.server.NetLoginHandler.a(NetLoginHandler.java:39)
        at net.minecraft.server.NetworkListenThread.a(SourceFile:94)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:471)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
2011-11-06 08:53:59 [SEVERE] java.lang.NullPointerException
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.Packet21PickupSpawn.<init>(SourceFile:22)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:240)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:192)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.EntityTrackerEntry.scanPlayers(EntityTrackerEntry.java:233)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.EntityTrackerEntry.track(EntityTrackerEntry.java:59)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.EntityTracker.updatePlayers(EntityTracker.java:118)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:476)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
2011-11-06 08:53:59 [SEVERE]    at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
2011-11-06 08:53:59 [SEVERE] Unexpected exception
java.lang.NullPointerException
        at net.minecraft.server.Packet21PickupSpawn.<init>(SourceFile:22)
        at net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:240)
        at net.minecraft.server.EntityTrackerEntry.b(EntityTrackerEntry.java:192)
        at net.minecraft.server.EntityTrackerEntry.scanPlayers(EntityTrackerEntry.java:233)
        at net.minecraft.server.EntityTrackerEntry.track(EntityTrackerEntry.java:59)
        at net.minecraft.server.EntityTracker.updatePlayers(EntityTracker.java:118)
        at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:476)
        at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
        at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)
2011-11-06 08:54:28 [INFO] Read timed out
2011-11-06 08:55:56 [INFO] Read timed out
2011-11-06 08:56:34 [INFO] Connection reset
2011-11-06 08:56:54 [INFO] Connection reset
2011-11-06 08:57:32 [INFO] [MCServerlist] Server updated on mcserverlist.net!
2011-11-06 08:57:56 [INFO] Connection reset
2011-11-06 08:58:14 [INFO] Read timed out
2011-11-06 08:58:18 [INFO] Read timed out

I've remove NoLagg for now, read in another thread it might have been the problem. Im not holding my breath... however, I did update NoLagg yesterday to 1.41.... maybe this will do it.. /me crosses fingers

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

 

Same here. happens with a player of mine using a MAC client. I do not have NoLagg installed either. Same exact error message.