Wiki – how to allow users to edit and post sub wikis on the front end?

Hi there,

I installed Wiki (the full version) and am using it with Decode theme. Although I, the admin, can create and edit wikis fine, my users don’t seem to be able to. I’ve read elsewhere that its not possible for users who aren’t admins to create root wikis, which is pretty disappointing, but I’m not even able to get them to be able to edit or create sub wikis! How can I allow them to do this?

Thanks Much!