Index: install.php
===================================================================
RCS file: /cvs/drupal/drupal/install.php,v
retrieving revision 1.98
diff -u -p -r1.98 install.php
--- install.php	30 Nov 2007 12:19:10 -0000	1.98
+++ install.php	30 Nov 2007 21:38:48 -0000
@@ -32,6 +32,17 @@ function install_main() {
   // Set up $language, so t() caller functions will still work.
   drupal_init_language();
 
+  // Load module basics (needed for hook invokes).
+  include_once './includes/module.inc';
+  $module_list['system']['filename'] = 'modules/system/system.module';
+  $module_list['filter']['filename'] = 'modules/filter/filter.module';
+  module_list(TRUE, FALSE, FALSE, $module_list);
+  drupal_load('module', 'system');
+  drupal_load('module', 'filter');
+
+  // Set up theme system for the maintenance page.
+  drupal_maintenance_theme();
+
   // Check existing settings.php.
   $verify = install_verify_settings();
 
@@ -63,14 +74,6 @@ function install_main() {
     $task = NULL;
   }
 
-  // Load module basics (needed for hook invokes).
-  include_once './includes/module.inc';
-  $module_list['system']['filename'] = 'modules/system/system.module';
-  $module_list['filter']['filename'] = 'modules/filter/filter.module';
-  module_list(TRUE, FALSE, FALSE, $module_list);
-  drupal_load('module', 'system');
-  drupal_load('module', 'filter');
-
   // Decide which profile to use.
   if (!empty($_GET['profile'])) {
     $profile = preg_replace('/[^a-zA-Z_0-9]/', '', $_GET['profile']);
@@ -104,7 +107,6 @@ function install_main() {
     // If any error messages are set now, it means a requirement problem.
     $messages = drupal_set_message();
     if (!empty($messages['error'])) {
-      drupal_maintenance_theme();
       install_task_list('requirements');
       drupal_set_title(st('Requirements problem'));
       print theme('install_page', '');
@@ -191,7 +193,6 @@ function install_change_settings($profil
 
   // We always need this because we want to run form_get_errors.
   include_once './includes/form.inc';
-  drupal_maintenance_theme();
   install_task_list('database');
 
   if ($db_url == 'mysql://username:password@localhost/databasename') {
@@ -444,7 +445,6 @@ function install_select_profile() {
       }
     }
 
-    drupal_maintenance_theme();
     install_task_list('profile-select');
 
     drupal_set_title(st('Select an installation profile'));
@@ -510,7 +510,6 @@ function install_select_locale($profilen
   // the user know what he is doing.
   if (count($locales) == 1) {
     if ($profilename == 'default') {
-      drupal_maintenance_theme();
       install_task_list('locale-select');
       drupal_set_title(st('Choose language'));
       if (!empty($_GET['localize'])) {
@@ -552,7 +551,6 @@ function install_select_locale($profilen
       }
     }
 
-    drupal_maintenance_theme();
     install_task_list('locale-select');
 
     drupal_set_title(st('Choose language'));
@@ -592,7 +590,6 @@ function install_select_locale_form(&$fo
  * Show an error page when there are no profiles available.
  */
 function install_no_profile_error() {
-  drupal_maintenance_theme();
   install_task_list('profile-select');
   drupal_set_title(st('No profiles available'));
   print theme('install_page', '<p>'. st('We were unable to find any installer profiles. Installer profiles tell us what modules to enable and what schema to install in the database. A profile is necessary to continue with the installation process.') .'</p>');
@@ -606,7 +603,6 @@ function install_no_profile_error() {
 function install_already_done_error() {
   global $base_url;
 
-  drupal_maintenance_theme();
   drupal_set_title(st('Drupal already installed'));
   print theme('install_page', st('<ul><li>To start over, you must empty your existing database.</li><li>To install to a different database, edit the appropriate <em>settings.php</em> file in the <em>sites</em> folder.</li><li>To upgrade an existing installation, proceed to the <a href="@base-url/update.php">update script</a>.</li><li>View your <a href="@base-url">existing site</a>.</li></ul>', array('@base-url' => $base_url)));
   exit;
@@ -627,7 +623,6 @@ function install_tasks($profile, $task) 
   $url = $base_url .'/install.php?locale='. $install_locale .'&profile='. $profile;
 
   // Build a page for final tasks.
-  drupal_maintenance_theme();
   if (empty($task)) {
     variable_set('install_task', 'locale-initial-import');
     $task = 'locale-initial-import';
Index: includes/theme.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/theme.inc,v
retrieving revision 1.399
diff -u -p -r1.399 theme.inc
--- includes/theme.inc	30 Nov 2007 16:10:28 -0000	1.399
+++ includes/theme.inc	30 Nov 2007 21:38:48 -0000
@@ -416,7 +416,8 @@ function list_themes($refresh = FALSE) {
     $list = array();
     $themes = array();
     // Extract from the database only when it is available.
-    if (db_is_active() && db_table_exists('system')) {
+    // Also check that the site is not in the middle of an install or update.
+    if (db_is_active() && !defined('MAINTENANCE_MODE')) {
       $result = db_query("SELECT * FROM {system} WHERE type = '%s'", 'theme');
       while ($theme = db_fetch_object($result)) {
         if (file_exists($theme->filename)) {
@@ -426,7 +427,7 @@ function list_themes($refresh = FALSE) {
       }
     }
     else {
-      // When the database is unavailable, scan the installation.
+      // Scan the installation when the database should not be read.
       $themes = _system_theme_data();
     }
 
@@ -449,6 +450,11 @@ function list_themes($refresh = FALSE) {
       if (isset($theme->info['base theme'])) {
         $theme->base_theme = $theme->info['base theme'];
       }
+      // Status is normally retrieved from the database. Add zero values when
+      // read from the installation directory to prevent notices.
+      if (!isset($theme->status)) {
+        $theme->status = 0;
+      }
       $list[$theme->name] = $theme;
     }
   }
Index: includes/theme.maintenance.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/theme.maintenance.inc,v
retrieving revision 1.1
diff -u -p -r1.1 theme.maintenance.inc
--- includes/theme.maintenance.inc	30 Nov 2007 12:19:10 -0000	1.1
+++ includes/theme.maintenance.inc	30 Nov 2007 21:38:48 -0000
@@ -31,23 +31,23 @@ function _drupal_maintenance_theme() {
   require_once './includes/database.inc';
   unicode_check();
 
-  // Load module basics (needed for hook invokes).
-  $module_list['system']['filename'] = 'modules/system/system.module';
-  $module_list['filter']['filename'] = 'modules/filter/filter.module';
-  module_list(TRUE, FALSE, FALSE, $module_list);
-  drupal_load('module', 'system');
-  drupal_load('module', 'filter');
-
-  $themes = list_themes();
-
   // Install and update pages are treated differently to prevent theming overrides.
   if (defined('MAINTENANCE_MODE') && (MAINTENANCE_MODE == 'install' || MAINTENANCE_MODE == 'update')) {
     $theme = 'minnelli';
   }
   else {
+    // Load module basics (needed for hook invokes).
+    $module_list['system']['filename'] = 'modules/system/system.module';
+    $module_list['filter']['filename'] = 'modules/filter/filter.module';
+    module_list(TRUE, FALSE, FALSE, $module_list);
+    drupal_load('module', 'system');
+    drupal_load('module', 'filter');
+
     $theme = variable_get('maintenance_theme', 'minnelli');
   }
 
+  $themes = list_themes();
+
   // Store the identifier for retrieving theme settings with.
   $theme_key = $theme;