Error

2012-12-17 04:31:03 [WARNING] Failed to handle packet for nickbbeezy/127.0.0.1: java.lang.ArrayIndexOutOfBoundsException: 4
java.lang.ArrayIndexOutOfBoundsException: 4
	at net.minecraft.server.EntityHuman.setEquipment(EntityHuman.java:1392)
	at net.minecraft.server.EntityLiving.c(EntityLiving.java:1319)
	at net.minecraft.server.EntityHuman.c(EntityHuman.java:304)
	at net.minecraft.server.EntityLiving.j_(EntityLiving.java:508)
	at net.minecraft.server.EntityHuman.j_(EntityHuman.java:154)
	at net.minecraft.server.EntityPlayer.g(EntityPlayer.java:192)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:350)
	at net.minecraft.server.Packet10Flying.handle(SourceFile:136)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:290)
	at net.minecraft.server.NetServerHandler.d(NetServerHandler.java:113)
	at net.minecraft.server.ServerConnection.b(SourceFile:39)
	at net.minecraft.server.DedicatedServerConnection.b(SourceFile:30)
	at net.minecraft.server.MinecraftServer.r(MinecraftServer.java:595)
	at net.minecraft.server.DedicatedServer.r(DedicatedServer.java:222)
	at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:493)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:426)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:856)