I just followed the tutorial of unity sdk about friend smash, I used unity 4.3 and the sdk is 5.1.
I followed the tutorial until the personalize section here:
https://developers.facebook.com/docs/games/unity/unity-tutorial#personalize
I stopped here because I want to get not only the user name but the email too, the thing is I can't do it.
I even checked the permisions granted, but only public_profile and user_friends are grantend. I'm using the FB.Login function like this:
FB.Login("email,publish_actions", LoginCallback);
But even this way I don't have access to the email field.