Well, first of all let me say that I really like Roles & Capabilities, having finally got round to a big 1.6 to 1.8 upgrade. I know it provoked uneasy reactions a few months ago, but seems to me both powerful, and fit for purpose, and by Moodle-standards, well-documented!
One minor puzzle: I can't see how or where Authenticated Users editing their own email address in Edit Profile is prevented. I'm happy that this is the case, as I used to have a hack in user/edit.htm to achieve this prevention (1.6, prev), but just wondered in case we want to allow it for selected roles...?
Tony