=== modified file 'includes/bootstrap.inc'
--- includes/bootstrap.inc	2009-12-02 19:26:21 +0000
+++ includes/bootstrap.inc	2009-12-05 15:59:32 +0000
@@ -1566,7 +1566,10 @@ function _drupal_bootstrap_page_cache() 
 
   // Allow specifying special cache handlers in settings.php, like
   // using memcached or files for storing cache information.
-  require_once DRUPAL_ROOT . '/' . variable_get('cache_inc', 'includes/cache.inc');
+  require_once DRUPAL_ROOT . '/includes/cache.inc';
+  foreach (variable_get('cache_inc', array()) as $include) {
+    require_once DRUPAL_ROOT . '/' . $include;
+  }
   // Check for a cache mode force from settings.php.
   if (variable_get('page_cache_without_database')) {
     $cache_mode = CACHE_NORMAL;

=== modified file 'install.php'
--- install.php	2009-11-29 19:50:24 +0000
+++ install.php	2009-12-05 16:00:39 +0000
@@ -267,7 +267,6 @@ function install_begin_request(&$install
   // suspect, due to the fact that Drupal is not fully set up yet.
   require_once DRUPAL_ROOT . '/includes/cache.inc';
   require_once DRUPAL_ROOT . '/includes/cache-install.inc';
-  $conf['cache_inc'] = 'includes/cache.inc';
   $conf['cache_default_class'] = 'DrupalFakeCache';
 
   // Prepare for themed output, if necessary. We need to run this at the