i've been using your plugin (v 1.6.8.) for a while now, and i find it excellent (previously used Role Scoper).
i'm now having quite a problem with another one, and while checking for the solution i've found out i'm unable to assing certain capabilities that, i think, should be possible to set instead.
the problem i'm having is with the Ajax Event Calendar (http://wordpress.org/extend/plugins/ajax-event-calendar/): can't find a way to assing to the Editor role the capability to manage the calendar. the plugin sets a role itself, "Calendar Contributor", and of course there's no way to assing multiple roles to the same user.
as super admin, i have no problem, but as editor i can't see the main menu link, nor can access it via url 'cos i get the "not enough permission" error.
while checking this problem, i noticed that, although i gave the role editor all capabilities for managing comments, i still cannot modify/activate/spam/trash comments as editor.
any idea what/where i can check?