Index: modules/taxonomy/taxonomy.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/taxonomy/taxonomy.admin.inc,v
retrieving revision 1.50
diff -u -F^function -r1.50 taxonomy.admin.inc
--- modules/taxonomy/taxonomy.admin.inc	26 Apr 2009 19:44:40 -0000	1.50
+++ modules/taxonomy/taxonomy.admin.inc	28 Apr 2009 15:20:09 -0000
@@ -171,11 +171,9 @@ function taxonomy_form_vocabulary(&$form
     '#default_value' => $edit['required'],
     '#description' => t('At least one term in this vocabulary must be selected when submitting a post.'),
   );
-  // Set the hierarchy to "multiple parents" by default. This simplifies the
-  // vocabulary form and standardizes the term form.
   $form['hierarchy'] = array(
     '#type' => 'value',
-    '#value' => '0',
+    '#value' => $edit['hierarchy'],
   );
   // Enable "related terms" by default.
   $form['relations'] = array(