Comment 46 for bug 595265

Same here, add account dialog doesn't shows add neither cancel button.

Managed to add the facebook account after several resizes and clicking again authorize button.

For me the resize didn't made the trick, but clicking several times on authorise did, at first it says something like "authorisation with fb completed" but after several clicks it told me "autorisation for Javier Fernandez completed" and then showed the add button, so looks like if it can't read real name from facebbok it don't shows the add button.