Index: sites/default/default.settings.php
===================================================================
RCS file: /cvs/drupal/drupal/sites/default/default.settings.php,v
retrieving revision 1.5
diff -u -p -r1.5 default.settings.php
--- sites/default/default.settings.php	30 Nov 2007 12:19:10 -0000	1.5
+++ sites/default/default.settings.php	17 Dec 2007 18:06:12 -0000
@@ -170,6 +170,11 @@ ini_set('url_rewriter.tags',        '');
  */
 # $conf = array(
 #   'site_name' => 'My Drupal site',
+/**
+ * Enable this setting to set a custom default theme that will be used
+ * whenever this settings file is used. Be aware that when this setting is
+ * active that you cannot change the theme through 'admin/build/themes'.
+ */
 #   'theme_default' => 'minnelli',
 #   'anonymous' => 'Visitor',
 /**