Bukkit

v2.3

• New system for checking distance between players and mobs (50% performance improvement + 50% less confusing :P)
• Added Bonus Spawns upon mob Birth/Death
• Increased default mob limits

Note: Must use CraftBukkit 1.4.6 R0.2 or newer

Since v2.1b format for abilities has changed and I do not have a config converter, so you will have to convert any configuration for abilities manually

The limiter however will move/change configs accordingly saving and converting your settings without any loss. :)