Zitat eines Tier-Experimentators: "Man darf die menschlichen Grundsätze einfach nicht für Tiere anwenden." (http://tiny.cc/2b6gg)

Fehlermeldung

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• Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'comment_node_activitystream_form' not found or invalid function name in drupal_retrieve_form() (Zeile 773 von /usr/share/drupal7/includes/form.inc).