Blank page on login/register

JuJ,
Thank you so much for contributing this back. The language file we had was contributed by another user for a previous release. We updated it (poorly) with some of the new strings in 3.2, but we're not perfect. We'll include it in the 3.2.1 release due out very soon, with a few bug-fixes (including the one for sh404 above).

Finally, regarding one-click registration, you can set this ability by changing the "User Creation" setting to "Facebook User Only" in the JFBConnect configuration area. It's a setting for all users, but should do what you're looking for.

Glad we got you set up, and good luck! If you continue to use JFBConnect, we'd appreciate it if you'd consider leaving a rating and review at the Joomla Extension Directory:
extensions.joomla.org/extensions/social-...ook-integration/7215

JuJ,
For future releases, we'll likely be putting out a 'call for translations' ahead of time. As JFBConnect grows, multiple languages become more important to support. We just released 3.2.1 of JFBConnect with minor bug fixes (and a few minor new features), and it also included your updated French translation.

Thanks again, and good luck. Should you need anything else from us, you know where to find us!