--- pathauto.module.old	2009-01-15 12:13:06.000000000 +0200
+++ pathauto.module.new	2009-01-15 12:34:54.000000000 +0200
@@ -198,6 +198,10 @@ function pathauto_path_alias_types() {
  * Implementation of hook_nodeapi().
  */
 function pathauto_nodeapi(&$node, $op, $teaser, $page) {
+  // Don't run Pathauto if the user didn't edit the current node.
+  if (!(arg(0) == 'node' && arg(1) == $node->nid && arg(2) == 'edit'))
+    return;
+
   _pathauto_include();
   if (module_exists('path')) {
     switch ($op) {