By default, 6 user profiles will be present. It will be possible to delete all of them except the "Administrator" one and of course it will be possible to add some new ones. User profiles can be created, copied, edited and deleted. If the user profile associated to one or several users is deleted, the users will loose all their rights until they are associated to another user profile.
The good thing is that if at one point you edit a user profile, the changes will apply to all users associated to this profile. When you create a new user, it will also be easier to set his rights as he will probably need some rights that you already defined in one user profile.
WARNING: By default, when migrating to 1.5a5 all the users will be associated to the "Administrator" user profile. You'll have to associate your users to either the default profiles that fit or create you own user profiles and individually associate your users to appropriate ones.
