If you read this: If you use GroupUsers, you need version 1.4 or newer. Because he released an update to GroupUsers but didn't change the version from 1.4, you may have to re-downloaded GroupUsers to make sure that it is the latest. On: http://forums.bukkit.org/threads/wo...oid-tools-de-griefing-supports-groupusers.62/ So what do they mean?