I have two sites in my Apps account and I've got them working for Facebook OAuth, why almost same FB login buttons lead to different permissions asking page.
First, not pretty page with permissions request from user and buttons LogIn Cancel.
www.facebook.com/dialog/oauth?scope=email,user_birthday&client_id=299921333363453&redirect_uri=http://www.weightfighters.com/&response_type=token
Second, the one I like more and want to have on my first site has pretty dialog page and buttons Allow Don't Allow:
www.facebook.com/dialog/oauth?scope=email,user_birthday&client_id=202378033138565&redirect_uri=http://www.loveatfirstsite.com/test/&response_type=token
The only reason I assume is different App settings in FB but they look same to me. What could be a reason?