I have posted this error in the Smart Moving topic and Divisor says its a minecraft forge error when smart moving is installed. Any help with this would be great! Also, it doesn't seem to cause any problems, just a messy console. lol
Here is a link to the topic I have mentioned.
2012-11-01 15:01:45 [sEVERE] [ForgeModLoader] A critical server error occured handling a packet, kicking net.smart.moving.playerapi.NetServerHandler@79541d
java.lang.NullPointerException
at cpw.mods.fml.common.modloader.ModLoaderConnectionHandler.connectionClosed(ModLoaderConnectionHandler.java:42)
at cpw.mods.fml.common.network.NetworkRegistry.connectionClosed(NetworkRegistry.java:213)
at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionClosed(FMLNetworkHandler.java:315)
at bx.b(TcpConnection.java:449)
at im.d(NetServerHandler.java:82)
at in.b(NetworkListenThread.java:55)
at hk.b(SourceFile:30)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:664)
at hg.r(DedicatedServer.java:241)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:585)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:492)
at fp.run(SourceFile:818)
2012-11-01 15:01:45 [WARNING] [Minecraft] Failed to handle packet: java.lang.NullPointerException
java.lang.NullPointerException
at cpw.mods.fml.common.modloader.ModLoaderConnectionHandler.connectionClosed(ModLoaderConnectionHandler.java:42)
at cpw.mods.fml.common.network.NetworkRegistry.connectionClosed(NetworkRegistry.java:213)
at cpw.mods.fml.common.network.FMLNetworkHandler.onConnectionClosed(FMLNetworkHandler.java:315)
at bx.b(TcpConnection.java:449)
at im.d(NetServerHandler.java:82)
at in.b(NetworkListenThread.java:55)
at hk.b(SourceFile:30)
at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:664)
at hg.r(DedicatedServer.java:241)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:585)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:492)
at fp.run(SourceFile:818)