I've just installed the plugin and attempted to set up the Social Publisher.
When I click on the "Add a Facebook account to your WordPress account" link I am taken to my profile page but all I see is a Facebook Account heading with "Get started" below.
It looks as though there should be a "Connect to Facebook" plugin beside it but there is nothing. I checked the HTML - the table cell there is blank.
I'm on v1.5.2, WP v3.6 and I switched off all other plugins and reverted to the default theme but still have the same issue.