--- includes/database/pgsql/database.inc	Sat Sep 20 17:43:32 2008
+++ includes/database/pgsql/database.inc	Tue Sep 30 22:12:05 2008
@@ -62 +62 @@
-        _db_need_install();
+        _drupal_install_required();
--- includes/database/database.inc	Mon Sep 29 19:28:09 2008
+++ includes/database/database.inc	Tue Sep 30 22:12:05 2008
@@ -356 +356 @@
-        _db_need_install();
+        _drupal_install_required();
@@ -757,3 +756,0 @@
-    if (empty($databases)) {
-      _db_need_install();
-    }
@@ -878 +875 @@
-      _db_need_install();
+      _drupal_install_required();
@@ -1862,7 +1858,0 @@
-}
-
-function _db_need_install() {
-  if (!function_exists('install_goto')) {
-    include_once DRUPAL_ROOT . '/includes/install.inc';
-    install_goto('install.php');
-  }
--- includes/bootstrap.inc	Sat Sep 20 17:42:26 2008
+++ includes/bootstrap.inc	Tue Sep 30 22:12:05 2008
@@ -365,0 +366,6 @@
+  // If the $databases configuration array has not been populated, then
+  // an installation is required.
+  if (empty($databases)) {
+    _drupal_install_required();
+  }  
+
@@ -1085,0 +1092,9 @@
+/**
+ * Send the user to the installer page.
+ */
+function _drupal_install_required() {
+  if (!function_exists('install_goto')) {
+    include_once DRUPAL_ROOT . '/includes/install.inc';
+    install_goto('install.php');
+  }  
+}
--- includes/install.inc	Tue Sep 30 23:42:47 2008
+++ includes/install.inc	Wed Oct 01 09:02:56 2008
@@ -207,0 +208,5 @@
+  
+  // Initialize the database system if it has not been
+  // initialized yet. We do not initialize it earlier to make
+  // requirements check during the installation.
+  require_once DRUPAL_ROOT . '/includes/database/database.inc';  
--- includes/theme.inc	Sat Sep 20 17:42:28 2008
+++ includes/theme.inc	Tue Sep 30 22:16:54 2008
@@ -438 +438 @@
-    if (db_is_active() && !defined('MAINTENANCE_MODE')) {
+    if (!defined('MAINTENANCE_MODE') && db_is_active()) {
--- includes/theme.maintenance.inc	Tue Sep 30 23:42:47 2008
+++ includes/theme.maintenance.inc	Tue Sep 30 23:31:53 2008
@@ -31 +30,0 @@
-  require_once DRUPAL_ROOT . '/includes/database/database.inc';
--- install.php	Tue Sep 30 23:42:47 2008
+++ install.php	Wed Oct 01 09:44:39 2008
@@ -899 +899,17 @@
-
+  
+  // Check if the PDO library is available.
+  if (class_exists('PDO') && method_exists('PDO', 'query') && class_exists('PDOStatement') && class_exists('PDOException')) {
+    $requirements['pdo'] = array(
+      'title'       => st('PDO database API'),
+      'value'       => st('PDO extension enabled.'),
+    );    
+  }
+  else {
+    $requirements['pdo'] = array(
+      'title'       => st('PDO database API'),
+      'value'       => st('PDO extension not enabled.'),
+      'severity'    => REQUIREMENT_ERROR,
+      'description' => st('We were unable to find the PDO libray required by the databse API. <a href="@pdo">See the PHP PDO installation page</a> for instructions on how to enable PDO to continue with the installation process.', array('@pdo' => 'http://us.php.net/manual/en/pdo.installation.php')),    
+    );
+  }
+