Bukkit

• fixed ConcurrentModificationException occuring under some rare circumstances
• removed having to access native CraftBukkit classes; this makes the plugin compatible with the infamous commit breaking many plugins since dev build #2512
• added tab-complete support for all sub-commands and their components
• all plugin messages that are sent to players can now be freely changed and disabled
• removed the show-messages option from config.yml as it has been replaced by the above feature

The new messages.yml is generated with a mistake in it: At the bottom, the message for the death cause CONTACT is set, but it should actually be called CACTUS, which is the correct name for the cause. You have to manually change that, sorry.

Because of the compatibility requirement, experience orbs that are dropped by the /death drop command or expiring timers are now displayed really small despite their actual size.

This is a bug within Bukkit that is likely to persist until/unless a major change in the Minecraft client happens. It is however only a really tiny rendering issue that doesn't cause any harm.