Not sure if I had the same problem, but try to open this page: http://www.facebook.com/username , go back to gwibber and use your username instead of your email when you login to your account. After that the Add button appeared for me.
-- Can not add Facebook account as add button not displayed after authorisation. https://bugs.launchpad.net/bugs/595265 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
