Thanks for the links. I can definitely see where the problem is coming from. On those pages, there is an Open Graph tag that's setting the title for the page as "www.fretties.de-Das Social Frettwork".
Can you go into the JFBConnect - Open Graph / Configuration area. Check the "Defaults" box and make sure there isn't a line like:
title=www.fretties.de-Das Social Frettwork
If so, remove it as that's setting the title on *all* of your pages to that title for Facebook purposes. While there, also check that there aren't other tags there that you wouldn't want used on all pages of your site.
Hope that helps, but if not, let us know.
Thanks,
Alex