2012-02-17 13:53:02 [SEVERE] Could not pass event org.bukkit.event.entity.PlayerDeathEvent to pvparena
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$103.execute(JavaPluginLoader.java:1026)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:61)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:460)
	at org.bukkit.craftbukkit.event.CraftEventFactory.callPlayerDeathEvent(CraftEventFactory.java:367)
	at net.minecraft.server.EntityPlayer.die(EntityPlayer.java:171)
	at net.minecraft.server.EntityLiving.damageEntity(EntityLiving.java:545)
	at net.minecraft.server.EntityHuman.damageEntity(EntityHuman.java:612)
	at net.minecraft.server.EntityPlayer.damageEntity(EntityPlayer.java:213)
	at net.minecraft.server.EntityHuman.attack(EntityHuman.java:797)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:949)
	at net.minecraft.server.Packet7UseEntity.handle(SourceFile:33)
	at net.minecraft.server.NetworkManager.b(NetworkManager.java:226)
	at net.minecraft.server.NetServerHandler.a(NetServerHandler.java:100)
	at org.getspout.spout.SpoutNetServerHandler.a(SpoutNetServerHandler.java:552)
	at net.minecraft.server.NetworkListenThread.a(NetworkListenThread.java:78)
	at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:537)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:435)
	at net.minecraft.server.ThreadServerApplication.run(SourceFile:465)
Caused by: java.lang.reflect.InvocationTargetException
	at sun.reflect.GeneratedMethodAccessor158.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:601)
	at org.bukkit.plugin.java.JavaPluginLoader$103.execute(JavaPluginLoader.java:1024)
	... 17 more
Caused by: java.lang.IllegalArgumentException: Cannot drop AIR.
	at org.apache.commons.lang.Validate.isTrue(Validate.java:157)
	at org.bukkit.craftbukkit.CraftWorld.dropItem(CraftWorld.java:305)
	at org.bukkit.craftbukkit.CraftWorld.dropItemNaturally(CraftWorld.java:323)
	at net.slipcor.pvparena.managers.Inventories.drop(Inventories.java:176)
	at net.slipcor.pvparena.listeners.EntityListener.commitPlayerDeath(EntityListener.java:108)
	at net.slipcor.pvparena.listeners.EntityListener.onEntityDeath(EntityListener.java:70)
	... 21 more