Since the graph API v2.0 has been introduced, apps using this API don't get the user's real facebook ID, but rather something called app-scoped id (or something like that...). In the past, using the user's fb id I was able to easily retrieve their 50x50 profile image, but with the scoped id, the path "graph.facebook.com/USER_ID/picture" returns an error (if I use the scoped id as user_id).
Is there any way to get the url to the user's image in a way similar to what we could do before?