The 'backward' update will fix itself in the next few hours. The auto-updater checks for new releases every 24 hours, and we had to do a very quick release of v4.3.2 after some issues were found with v4.3.1. So, if you were in the admin area and JFBConnect saw the v4.3.1 update, it won't properly 'see' the v4.3.2 update until a little more time has passed. If by the end of the weekend, it still says the latest is v4.3.1, let us know.. that's definitely not right.
As for the custom login button, I think I see the problem. You've added a bunch of custom permission requests in the back-end but put each on a new-line. Those permissions should be comma-separated, like:
publish_stream,publish_actions,user_actions.news,user_about_me,user_birthday,user_likes,user_location,user_photos,user_website
Obviously, our code should be more forgiving as well. I've added a task to our bug-tracker to support new-line entered permissions as well, but for now, update to the above and hopefully that will fix your issue.
If not, let us know!
Thanks,
Alex