Index: trunk/wp-includes/cache.php
===================================================================
--- trunk/wp-includes/cache.php	(revision 3330)
+++ trunk/wp-includes/cache.php	(revision 3386)
@@ -54,5 +54,5 @@
 	var $cache_dir;
 	var $cache_enabled = false;
-	var $expiration_time = 86400;
+	var $expiration_time = 900;
 	var $flock_filename = 'wp_object_cache.lock';
 	var $cache = array ();