I now want to create a new forum and only a certain usergroup to be able to post new threads in it. I want others to be able to 'reply' to those threads, but not start new thread. Of course, admins and mods will have the ability to start new thread and post replies.
I therefore created a new usergroup and a forum. Through 'node permissions', I changed the setting "Start New Thread" to 'Never' for all the usergroups that should not be able to post new threads.
But now I (the admin) do not have the permission to start a new thread in the new section! I figured out that it's because I'm also the member of other usergroups, which do not have permission to start new threads.
How do I fix this?