Bukkit

What steps will reproduce the problem?
1. Tested various versions of bukkit, reverted to 1240 as shown to be working build for this plugin
2. Pulled spout plugin as this has broken a number of plugins

What is the expected output? What do you see instead?
When a hunt begins, console is flooded with errors

What version of the product are you using?
1.4

Do you have an error log of what happened?
2011-11-03 21:12:21 [SEVERE] Could not pass event CREATURE_SPAWN to MonsterHunt
java.lang.ClassCastException: java.lang.Boolean cannot be cast to java.lang.Integer
    at com.matejdro.bukkit.monsterhunt.Settings.getInt(Settings.java:22)
    at com.matejdro.bukkit.monsterhunt.listeners.MonsterHuntEntityListener.onCreatureSpawn(MonsterHuntEntityListener.java:283)
    at org.bukkit.plugin.java.JavaPluginLoader$71.execute(JavaPluginLoader.java:740)
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:58)
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:339)
    at org.bukkit.craftbukkit.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:242)
    at net.minecraft.server.World.addEntity(World.java:849)
    at net.minecraft.server.SpawnerCreature.spawnEntities(SpawnerCreature.java:117)
    at net.minecraft.server.World.doTick(World.java:1620)
    at net.minecraft.server.MinecraftServer.h(MinecraftServer.java:461)
    at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:374)
    at net.minecraft.server.ThreadServerApplication.run(SourceFile:417)

Please provide any additional information below.

Infollow up, I have since worked out that this happens when I enable the check for outside spawned mobs

Can you post config?