Issues when none of the facebook fields to import are checked, there is an error

Hi, thanks for a great module.

On the user profile, uncheck all fields and submit the form. Error message is

warning: implode() [function.implode]: Invalid arguments passed in /[...]/sites/all/modules/fbconnect/fbconnect.module on line 121.
Error importing from facebook

Changed line 121 to:

  $fb_user_profile = fbconnect_query_personal_info($fbuid, $field_to_import?implode(',', $field_to_import):'');

Futhermore, when I uncheck everything, the site falls back to the defaults (line 113) when they would be override if I had provided a value. I suppose this is for when people register ? But it doesn't make sense once they are editing their profile.