Index: node.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/node/node.module,v
retrieving revision 1.776.2.22
diff -u -p -r1.776.2.22 node.module
--- node.module	7 Jan 2008 01:31:26 -0000	1.776.2.22
+++ node.module	11 Mar 2008 11:29:36 -0000
@@ -561,6 +561,9 @@ 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;