When authenticating users via facebook, you have a laundry list of possible permissions to ask for. If you ask for no permissions, the user gets the following login window:
Any requested permissions get displayed in the login window, but some of them get grouped into the same permission category. For example, many of the user_foo privileges get grouped into "Access my profile information", and similarly, friends_foo permissions get grouped into "Access my friends' information". Below is a screenshot of what it looks like when asking for the full suite of permissions (I used the helpful Rell application to test). From this you can get an idea of what it looks like to the user based on which permissions you're asking for.
Asking for all permissions at once would be a little intimidating for users . . .