Ticket #15815: 15815.diff

wp-admin/options-permalink.php

@@ -97 +97 @@
                         $tag_base = $blog_prefix . preg_replace('#/+#', '/', '/' . str_replace( '#', '', $tag_base ) );
                 $wp_rewrite->set_tag_base( $tag_base );
         }
+
+        create_initial_taxonomies();
 }
 
 $permalink_structure = get_option('permalink_structure');