Index: drupal-6.16/modules/trigger/trigger.module
===================================================================
--- drupal-6.16/modules/trigger/trigger.module	(revision 34865)
+++ drupal-6.16/modules/trigger/trigger.module	(working copy)
@@ -281,7 +281,7 @@
   // Keep objects for reuse so that changes actions make to objects can persist.
   static $objects;
   // We support a subset of operations.
-  if (!in_array($op, array('insert', 'update', 'delete', 'view'))) {
+  if (!in_array($op, array('insert', 'update', 'delete', 'view', 'publish', 'unpublish'))) {
     return;
   }
   $aids = _trigger_get_hook_aids('comment', $op);