-User access. I assigned a user as a moderator to 2 forums. He somehow could not login because his profile, upon login, would say that it appears that he was provided admin rights but admin has not assigned him any access and can therefore not log into the site and to contact the admin for the properly assigned priviledges. Sorry I dont recall the exact error. I had logged in no problem using his profile so I think it may be a cookie thing. I had others try and they got the same error as the user. So it was not a computer/cookie thing on the regular user end. I took away all his moderator stuff and made him a regular user and this problem went away. Clearing cache on the server did nothing to resolve this.
That particular problem, if you're still having it, is from not setting the correct number of moderators in ACP>Security>Special. Before setting anyone with Admin, Jr. Admin, or Moderator status, make sure to increase the number of allowed Admins and Mods. Jr. Admins count as Moderators.