Index: wp-admin/includes/upgrade.php
===================================================================
--- wp-admin/includes/upgrade.php	(revision 11001)
+++ wp-admin/includes/upgrade.php	(working copy)
@@ -447,9 +447,9 @@
 
 	$time_difference = $all_options->time_difference;
 
-	$server_time = time()+date('Z');
+	$server_time = strtotime(gmdate("Y-m-d H:i:s"))+date('Z');
 	$weblogger_time = $server_time + $time_difference*3600;
-	$gmt_time = time();
+	$gmt_time = strtotime(gmdate("Y-m-d H:i:s"));
 
 	$diff_gmt_server = ($gmt_time - $server_time) / 3600;
 	$diff_weblogger_server = ($weblogger_time - $server_time) / 3600;