After upgrading to 1.8 from 1.63, teachers cannot access existing teacher forums (access denied). As admin, you are able to view the headlines of the forum but when you click on them to view the article, you receive an empty page.
When creating new courses, a teacher's forum is NOT set up automatically. When creating one manually, everything works fine including "roles" and viewing articles.
Any help, especially with restoring the forum entries, would be greatly appreciated.