=== modified file 'install.php'
--- install.php	2007-07-25 17:35:47 +0000
+++ install.php	2007-08-17 06:00:20 +0000
@@ -139,7 +139,7 @@ function install_verify_settings() {
   global $db_prefix, $db_type, $db_url;
 
   // Verify existing settings (if any).
-  if (!empty($db_url)) {
+  if (!empty($db_url) && $db_url != 'mysql://username:password@localhost/databasename') {
     // We need this because we want to run form_get_errors.
     include_once './includes/form.inc';
 
@@ -174,6 +174,10 @@ function install_change_settings($profil
   $db_path = ltrim(urldecode($url['path']), '/');
   $conf_path = './'. conf_path();
   $settings_file = $conf_path .'/settings.php';
+  // Don't fill in placeholders for the defaults settings.
+  if ($db_url == 'mysql://username:password@localhost/databasename') {
+    $db_url = $db_user = $db_pass = $db_path = '';
+  }
 
   // We always need this because we want to run form_get_errors.
   include_once './includes/form.inc';