Update from 2016-09-21: The Facebook problems have been fixed. Thanks to everyone for the feedback and the testing help. (If you're interested in all the ugly details, there's a detailed technical blog post on the Shindigital website).
The all-new Remembary 3 has been out for almost a month now, and while the feedback has been generally positive, a number of people have reported problems getting the app to connect to Facebook properly.
I am working hard on fixing this problem, and hope to have an update out some time in September.
What has made fixing this problem extra difficult is that the Facebook connection only fails for some users, and not for me or any test users I've been able to set up.
If you're having trouble connecting Remembary to Facebook, please get in touch with me - the more examples I can collect, the easier it will be for me to figure out what's going on. I'm also building a group of testers who can help me make sure everything work properly. Please let me know if you'd like to be on this testing team - you'll not only help me fix these kinds of problems, but you'll also get new versions of Remembary a little bit earlier than everyone else!