Index: kernel/utility/cache.php
===================================================================
--- kernel/utility/cache.php	(revision 15309)
+++ kernel/utility/cache.php	(working copy)
@@ -271,7 +271,7 @@
 		 */
 		function getCache($name, $store_locally = true, $max_rebuild_seconds = 0)
 		{
-			$cached_data = $this->_getCache(Array ($name . '_rebuild', $name . '_serials'), Array (true, false));
+			$cached_data = $this->_getCache(Array ($name . '_rebuild', $name . '_serials'), Array (true, true));
 
 			if ( $cached_data[$name . '_rebuild'] ) {
 				// cache rebuild requested -> rebuild now