DiabloDrops error new version in 1.5.2

2014-01-24 12:52:25 [SEVERE] Could not pass event CreatureSpawnEvent to DiabloDrops v2.6
org.bukkit.event.EventException
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:427)
	at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
	at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
	at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
	at org.bukkit.craftbukkit.v1_5_R3.event.CraftEventFactory.callCreatureSpawnEvent(CraftEventFactory.java:239)
	at net.minecraft.server.v1_5_R3.World.addEntity(World.java:924)
	at net.minecraft.server.v1_5_R3.SpawnerCreature.spawnEntities(SpawnerCreature.java:159)
	at net.minecraft.server.v1_5_R3.WorldServer.doTick(WorldServer.java:186)
	at net.minecraft.server.v1_5_R3.MinecraftServer.r(MinecraftServer.java:555)
	at net.minecraft.server.v1_5_R3.DedicatedServer.r(DedicatedServer.java:226)
	at net.minecraft.server.v1_5_R3.MinecraftServer.q(MinecraftServer.java:477)
	at net.minecraft.server.v1_5_R3.MinecraftServer.run(MinecraftServer.java:410)
	at net.minecraft.server.v1_5_R3.ThreadServerApplication.run(SourceFile:573)
Caused by: java.lang.IllegalArgumentException: n must be positive
	at java.util.Random.nextInt(Unknown Source)
	at us.deathmarine.diablodrops.drops.DropsAPI.colorPicker(DropsAPI.java:68)
	at us.deathmarine.diablodrops.drops.DropsAPI.getItem(DropsAPI.java:550)
	at us.deathmarine.diablodrops.drops.DropsAPI.getItem(DropsAPI.java:358)
	at us.deathmarine.diablodrops.listeners.MobListener.onSpawn(MobListener.java:53)
	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:425)
	... 12 more