When answering in a forumitem, drupal gives the following notice and warning:
Notice: Trying to get property of non-object in marinelli_preprocess_comment() (regel 204 van /customers/9/1/2/fio-data.be/httpd.www/vliegvissen/sites/all/themes/marinelli/template.php).
Warning: array_flip(): Can only flip STRING and INTEGER values! in DrupalDefaultEntityController->load() (regel 178 van /customers/9/1/2/fio-data.be/httpd.www/vliegvissen/includes/entity.inc).