Index: pathauto.inc
===================================================================
--- pathauto.inc	(revision 219)
+++ pathauto.inc	(working copy)
@@ -316,6 +316,10 @@
         array('%original_alias' => $original_alias, '%alias' => $alias)));
     }
   }
+  
+  if ($op == 'return') {
+    return $alias;
+  }
 
   // If $pid is NULL, a new alias is created - otherwise, the existing
   // alias for the designated src is replaced
Index: pathauto.module
===================================================================
--- pathauto.module	(revision 219)
+++ pathauto.module	(working copy)
@@ -289,10 +289,13 @@
       drupal_add_js(drupal_get_path('module', 'pathauto') .'/pathauto.js');
       $form['path']['#collapsed'] = FALSE;
 
+      $placeholders = pathauto_get_placeholders('node', $node);
+      $alias = pathauto_create_alias('node', 'return', $placeholders, "node/{$node->nid}", $node->nid, $node->type, $node->language);
+      
       $form['path']['pathauto_perform_alias'] = array(
         '#type' => 'checkbox',
         '#title' => t('Automatic alias'),
-        '#default_value' => isset($node->pathauto_perform_alias) ? $node->pathauto_perform_alias : TRUE,
+        '#default_value' => !$node->pathauto_perform_alias && (!isset($node->path) || ($alias == $node->path)),
         '#description' => $output,
         '#weight' => -1,
       );