With my surprise, after a coupe of week of correct working, some users told me that, after the login with facebook connect, all the site contents, such as menus and posts, aren't accessible.
That's is caused by an incompatibility issue between Role Scoper and wp-facebookconnect plugins.
I think that after login Role Scoper don't recognize the user level of the registred Facebook Users, and so revoke all the permission to them.
My solution consists to decrease the Wp Facebook Connect hooks execution priority to zero:
- Open wp-contents/plugins/wp-facebookconnect/fbconnect.php
- Find the line 93
this line add an action to wordpress init hook
- Decrese the priority of the action adding the priority option after the action name
add_action('init', 'fbc_init_auth', 0);
- Save and now everything is working fine :)