Index: modules/spam_comment.inc
===================================================================
--- modules/spam_comment.inc	(revision 32990)
+++ modules/spam_comment.inc	(working copy)
@@ -22,6 +22,9 @@
     case 'delete':
       spam_content_delete($comment, 'comment');
       break;
+    case 'publish':
+      spam_mark_as_not_spam('comment', $comment['cid']);
+      break;
     case 'form':
       if (is_array($comment['cid'])) {
         _spam_comment_cid($comment['cid']['#value']);