Ticket #5699: get_col.diff

wp-includes/comment.php

@@ -992 +992 @@
         }
 
         // Do Trackbacks
-        $trackbacks = $wpdb->get_results("SELECT ID FROM $wpdb->posts WHERE to_ping <> '' AND post_status = 'publish'");
+        $trackbacks = $wpdb->get_col("SELECT ID FROM $wpdb->posts WHERE to_ping <> '' AND post_status = 'publish'");
         if ( is_array($trackbacks) ) {
                 foreach ( $trackbacks as $trackback )
                         do_trackbacks($trackback->ID);