Index: modules/system/system.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.admin.inc,v
retrieving revision 1.48
diff -u -p -r1.48 system.admin.inc
--- modules/system/system.admin.inc	31 Dec 2007 17:20:20 -0000	1.48
+++ modules/system/system.admin.inc	5 Jan 2008 22:51:49 -0000
@@ -1729,10 +1729,10 @@ function system_status($check = FALSE) {
 function system_run_cron() {
   // Run cron manually
   if (drupal_cron_run()) {
-    drupal_set_message(t('Cron ran successfully'));
+    drupal_set_message(t('Cron ran successfully.'));
   }
   else {
-    drupal_set_message(t('Cron run failed'));
+    drupal_set_message(t('Cron run failed.', 'error'));
   }
 
   drupal_goto('admin/reports/status');