Forums: Missing Button "New Thread"
thanks for you answer last year.
I gave up back then, dropped the whole installation and started everything from scratch. Things work now as they should.
Looking back my suspicion is a problem between the permissions and categories. In the previous installation I had (as far as I remember) all forums associated with any category (without limiting the permissions by most of these).
Now I use categories only for the forums with limited permissions - this way it works as I want it to.