Index: modules/taxonomy/taxonomy.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/taxonomy/taxonomy.admin.inc,v
retrieving revision 1.66
diff -u -p -r1.66 taxonomy.admin.inc
--- modules/taxonomy/taxonomy.admin.inc	23 Aug 2009 01:05:12 -0000	1.66
+++ modules/taxonomy/taxonomy.admin.inc	31 Aug 2009 17:07:25 -0000
@@ -561,7 +561,17 @@ function taxonomy_overview_terms_submit(
   // Save all updated terms.
   foreach ($changed_terms as $changed) {
     $term = (object)$changed;
-    taxonomy_term_save($term);
+    // Update term_hierachy and term_data directly since we don't have a
+    // fully populated term object to save.
+    db_update('taxonomy_term_hierarchy')
+      ->fields(array('parent' => $term->parent))
+      ->condition('tid', $term->tid, '=')
+      ->execute();
+
+    db_update('taxonomy_term_data')
+      ->fields(array('weight' => $term->weight))
+      ->condition('tid', $term->tid, '=')
+      ->execute();
   }
 
   // Update the vocabulary hierarchy to flat or single hierarchy.