diff --git a/wp-includes/cache.php b/wp-includes/cache.php
index 8bad63ad6..299c33fbe 100644
--- a/wp-includes/cache.php
+++ b/wp-includes/cache.php
@@ -1,6 +1,7 @@
 <?php
 function wp_cache_add($key, $data, $flag = '', $expire = 0) {
 	global $wp_object_cache;
+	$data = unserialize(serialize($data));
 
 	return $wp_object_cache->add($key, $data, $flag, $expire);
 }
@@ -37,12 +38,14 @@ function wp_cache_init() {
 
 function wp_cache_replace($key, $data, $flag = '', $expire = 0) {
 	global $wp_object_cache;
+	$data = unserialize(serialize($data));
 
 	return $wp_object_cache->replace($key, $data, $flag, $expire);
 }
 
 function wp_cache_set($key, $data, $flag = '', $expire = 0) {
 	global $wp_object_cache;
+	$data = unserialize(serialize($data));
 
 	return $wp_object_cache->set($key, $data, $flag, $expire);
 }
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 3bf2ede06..b02793009 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -3,6 +3,6 @@
 // This holds the version number in a separate file so we can bump it without cluttering the SVN
 
 $wp_version = '2.2-bleeding';
-$wp_db_version = 4773;
+$wp_db_version = 4774;
 
 ?>