I have the same problem here, give the plugin user role editor a try, but also doesn’t work. I want that the editors (my users) can upload a picture, but it seems impossible. Another issue is that all the users can use the HTML tab, I can t hide that tab. Why is this difference between the WP and BBPress roles? I’m very familiar and happy with WP (more than 50 installs) but bbpress is till now a very user unfriendly program for me. But maybe someone can change my mind.