Bukkit

IMPORTANT!

You need to convert inventories before you can play. To do this, use the '/qconvertinv (zone name)' command. This will convert all inventories, for the specified zone, to the new format. If you have a lot of .inv files, this might take a few seconds, and could cause a bit of lag. I suggest you do this while the server is empty, or almost empty. On my server, converting 100 files took less than a second, so it's quite fast.

Also, don't forget to update your config. Read the 'changes_to_config.yml' file in the zip archive.