diff --git a/wp-includes/cache.php b/wp-includes/cache.php
index ef4d454a7e..334a961018 100644
--- a/wp-includes/cache.php
+++ b/wp-includes/cache.php
@@ -8,6 +8,8 @@ function wp_cache_add($key, $data, $flag = '', $expire = 0) {
 function wp_cache_close() {
 	global $wp_object_cache;
 
+	if ( ! isset($wp_object_cache) )
+		return;
 	return $wp_object_cache->save();
 }
 
@@ -402,8 +404,14 @@ class WP_Object_Cache {
 	}
 
 	function WP_Object_Cache() {
+		return $this->__construct();
+	}
+	
+	function __construct() {
 		global $blog_id;
 
+		register_shutdown_function(array(&$this, "__destruct"));
+
 		if (defined('DISABLE_CACHE'))
 			return;
 
@@ -438,5 +446,10 @@ class WP_Object_Cache {
 
 		$this->blog_id = $this->hash($blog_id);
 	}
+
+	function __destruct() {
+		$this->save();
+		return true;	
+	}
 }
 ?>
diff --git a/wp-includes/wp-db.php b/wp-includes/wp-db.php
index f9d60023f9..790ddcfdee 100644
--- a/wp-includes/wp-db.php
+++ b/wp-includes/wp-db.php
@@ -40,6 +40,12 @@ class wpdb {
 	//	DB Constructor - connects to the server and selects a database
 
 	function wpdb($dbuser, $dbpassword, $dbname, $dbhost) {
+		return $this->__construct($dbuser, $dbpassword, $dbname, $dbhost);
+	}
+	
+	function __construct($dbuser, $dbpassword, $dbname, $dbhost) {
+		register_shutdown_function(array(&$this, "__destruct"));
+
 		$this->dbh = @mysql_connect($dbhost, $dbuser, $dbpassword);
 		if (!$this->dbh) {
 			$this->bail("
@@ -57,6 +63,10 @@ class wpdb {
 		$this->select($dbname);
 	}
 
+	function __destruct() {
+		return true;		
+	}
+
 	// ==================================================================
 	//	Select a DB (if another one needs to be selected)