Index: modules/node/node.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.module,v
retrieving revision 1.776.2.30
diff -u -p -r1.776.2.30 node.module
--- modules/node/node.module	16 Jul 2008 19:04:21 -0000	1.776.2.30
+++ modules/node/node.module	21 Sep 2008 02:13:45 -0000
@@ -601,6 +601,9 @@ function node_load($param = array(), $re
  * Save a node object into the database.
  */
 function node_save(&$node) {
+  // Let modules modify the node before it is saved to the database.
+  node_invoke ($node, 'presave');
+  node_invoke_nodeapi($node, 'presave');
   global $user;
 
   $node->is_new = FALSE;