Bukkit

• Prevent custom projectiles from slowing down the shooter if its launch knockback is 0
• Prevent custom projectile covers from hanging around in unloaded chunks
• Improve integration with third-party crafting plug-ins:

In the past, this plug-in would forbid any other plug-in to use custom items in crafting recipes. This constraint is relaxed in this update: using custom items in crafting recipes is now allowed when the result is a custom item.