BUG - Session key invalid or no longer valid

[magro]

When I log in using JConnector, and simply logout from facebook, facebookapi_php5_restlib.php generates an unhandled exception and joomla displays a blank page.

I modified the file so that the exception does not occur, but you should put it on the main code

  /**
   * Returns 1 if the user has the specified permission, 0 otherwise.
   * http://wiki.developers.facebook.com/index.php/Users.hasAppPermission
   *
   * @return integer  1 or 0
   */
  public function &users_hasAppPermission($ext_perm, $uid=null) {
    try {
        return $this->call_method('facebook.users.hasAppPermission',
        array('ext_perm' => $ext_perm, 'uid' => $uid));
    } catch (Exception $e) {
        return array(0,0);
    }
  }