Fred,
Once again, sorry for the delay and troubles. We got to the bottom of the problem, and it's a pretty silly bug on our part. Basically, we have a check in our code where we're only importing a user's profile information into JomSocial fields that are marked as "Registered". We'll be releasing an updated profile plugin in a day or so, but if you'd like to make a quick code change, you can implement the fix now.
If so, please edit /plugins/jlinkedprofiles/jomsocial.php At line 109, you'll see:
$filter = array('published' => '1', 'registration' => '1'); //, 'required' => '1');
Simply remove that registration portion, so it looks like:
$filter = array('published' => '1'); //, 'required' => '1');
Sorry this bug worked it's way past our automated tests. We'll update them to be more resilient with different configuration settings of the JomSocial fields.
If you don't want to make the code change, just grab the new zip package in a day or so (when the JLinked Overview page notifies you that the JomSocial plugin is out of date).
Thanks again for your patience and notification of the issue!
Alex