Because Pagure drops repository and group names in the root URL namespace, there's a host of repository/group names that will break in various ways:

• fork (sort of works, but the file browser breaks)
• admin (becomes inaccessible)
• search (takes you to the search page and becomes inaccessible
• ssh_info (becomes inaccessible)

There's clearly a check in Pagure already since for repos like settings or api it gets upset: "No project "settings" are allowed to be created due to potential conflicts in URLs with pagure itself"