Hello. I'm making my server, and i noticed that players are getting the "You don't have permission to interact with <item>" message everytime they try to use or break a block, even if they have build permission true. But what really surprises me is that, even with this error message, players can still break blocks and use items, but, everytime they do it, the message come up, and it's really annoying. Anybody? I'm using 1.6.4 CraftBukkit and GroupManager for my permissions.