bevor ich mich jetzt selbst dran versuche, hast du evtl. auf dieses Thema auch eine Antwort??
Hier liegt ja definitiv ein Fehler vor.
Sorry für das Crossover.
(Avoiding changes to the code): Customise the permissions for each relevant forum for each relevant "extra" usergroup: move, in the web UI, each of the "View", "Post Threads", "Post Replies", and "Post Polls" permissions for the relevant usergroups from the "Overview: Allowed Actions" column to the "Overview: Disallowed Actions", save them, and then move them all back to the "Overview: Allowed Actions" column and save them. This will break the inheritance, the permission indicator beside the groups' names will change from "(inherited)" to "(custom)", and the permissions should then work as expected.