I get this error all the time with forge and optifine ( and it was already there in 1.4.4).

 

I'm not sure if this is optifines "fault", if it is so, I am sorry to bother you

 

2012-11-20 19:25:35 [iNFO] [sTDERR] java.lang.NullPointerException
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at cf.b(MemoryConnection.java:159)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at cf.a(MemoryConnection.java:47)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at iv.b(NetServerHandler.java:636)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at gm.a(ServerConfigurationManager.java:89)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at bdr.b(IntegratedServerListenThread.java:99)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:691)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:587)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at bdo.q(IntegratedServer.java:110)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:494)
2012-11-20 19:25:35 [iNFO] [sTDERR] 	at fy.run(SourceFile:856)
2012-11-20 19:25:35 [iNFO] [ForgeModLoader] Unloading dimension 0
2012-11-20 19:25:35 [iNFO] [ForgeModLoader] Unloading dimension 1
2012-11-20 19:25:36 [iNFO] [sTDERR] t: Ticking screen
2012-11-20 19:25:36 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.l(Minecraft.java:1548)
2012-11-20 19:25:36 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.J(Minecraft.java:858)
2012-11-20 19:25:36 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.run(Minecraft.java:783)
2012-11-20 19:25:36 [iNFO] [sTDERR] 	at java.lang.Thread.run(Unknown Source)
2012-11-20 19:25:36 [iNFO] [sTDERR] Caused by: java.lang.NullPointerException
2012-11-20 19:25:36 [iNFO] [sTDERR] 	at aym.c(SourceFile:28)
2012-11-20 19:25:36 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.l(Minecraft.java:1541)
2012-11-20 19:25:36 [iNFO] [sTDERR] 	... 3 more
2012-11-20 19:25:46 [iNFO] [sTDOUT] Stopping!
2012-11-20 19:25:46 [iNFO] [sTDOUT] SoundSystem shutting down...
2012-11-20 19:25:46 [iNFO] [sTDOUT]     Author: Paul Lamb, www.paulscode.com

 

aym = GuiDownloadTerrain

 

It's the line  this.netHandler.addToSendQueue(new Packet0KeepAlive());  in:

 

public void updateScreen()
{
     ++this.updateCounter;
     if (this.updateCounter % 20 == 0)
     {
         this.netHandler.addToSendQueue(new Packet0KeepAlive());
     }
     if (this.netHandler != null)
     {
         this.netHandler.processReadPackets();
     }
}

 

or

public void c()
{
this.b += 1;
if (this.b % 20 == 0) {
     this.a.c(new dr());
}
if (this.a != null)
     this.a.d();
}

 

All mods get loaded proberly before.

 

This happens when I'm loading a new world.

 

But here is the clue, when I'm creating a new world, its loading. Then I go back to the main menu and load my old world, it's loading too, and the bug don't appear.

probably optifine.

 

I'm using mcpatcher and its working great. just un-check everything from mcpatcher that's there at default, and install mods with it. Supereasy, works for me.

 

even hi res textures ^^