getting logged-in user's details on another user's facebook profile tab

Question

I have a Facebook application that has a user profile tab. The specs of the app dictate that the layout of the profile tab should be different depending on whether a user is looking at their own profile, or someone else is looking.

Whenever I try to print_r FB's signed request details, the profile_id is always the same as the user_id, even if I am looking at the profile as another user.

Is there another way I can get this information, or is it not possible using Facebook's current setup?

Thanks!

Answer 1

Facebook sends visitor id only after they interact with your tab in some way, but not during the first visit.