Index: install.php
===================================================================
RCS file: /cvs/drupal/drupal/install.php,v
retrieving revision 1.236
diff -u -r1.236 install.php
--- install.php	1 Feb 2010 22:13:33 -0000	1.236
+++ install.php	9 Feb 2010 16:56:57 -0000
@@ -838,7 +838,7 @@
   if (!$drivers) {
     // There is no point submitting the form if there are no database drivers
     // at all, so throw an exception here.
-    throw new Exception(st('Your web server does not appear to support any common database types. Check with your hosting provider to see if they offer any databases that <a href="@drupal-databases">Drupal supports</a>.', array('@drupal-databases' => 'http://drupal.org/node/270#database')));
+    throw new Exception(st('Your web server does not appear to support any common PDO database types. Check with your hosting provider to see if they support PDO (PHP Data Objects) and offer any databases that <a href="@drupal-databases">Drupal supports</a>.', array('@drupal-databases' => 'http://drupal.org/node/270#database')));
   }
   else {
     $form['driver'] = array(
Index: INSTALL.txt
===================================================================
RCS file: /cvs/drupal/drupal/INSTALL.txt,v
retrieving revision 1.78
diff -u -r1.78 INSTALL.txt
--- INSTALL.txt	5 Feb 2010 21:15:43 -0000	1.78
+++ INSTALL.txt	9 Feb 2010 16:56:57 -0000
@@ -22,7 +22,8 @@
    or greater) (http://www.postgresql.org/), or SQLite (3.4.2 or greater)
    (http://www.sqlite.org/).
 
-For more detailed information about Drupal requirements, see "Requirements"
+For more detailed information about Drupal requirements, including a list of
+PHP extensions and configurations that are required, see "System requirements"
 (http://drupal.org/requirements) in the Drupal handbook.
 
 For detailed information on how to configure a test server environment using