Index: modules/system/system.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.admin.inc,v
retrieving revision 1.43
diff -u -p -r1.43 system.admin.inc
--- modules/system/system.admin.inc	20 Dec 2007 21:37:42 -0000	1.43
+++ modules/system/system.admin.inc	22 Dec 2007 14:06:04 -0000
@@ -1721,10 +1721,10 @@ 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');
Index: modules/system/system.install
===================================================================
RCS file: /cvs/drupal/drupal/modules/system/system.install,v
retrieving revision 1.216
diff -u -p -r1.216 system.install
--- modules/system/system.install	20 Dec 2007 08:57:55 -0000	1.216
+++ modules/system/system.install	22 Dec 2007 13:48:35 -0000
@@ -125,7 +125,7 @@ function system_requirements($phase) {
     // administration page, instead of an error, we display a helpful reminder
     // to configure cron jobs.
     if ($never_run && $severity != REQUIREMENT_ERROR && $_GET['q'] == 'admin') {
-      drupal_set_message($t('Cron has not run. Please visit the <a href="@status">status report</a> for more information.', array('@status' => url('admin/reports/status'))));
+      drupal_set_message($t('Cron has not run. Please visit the <a href="@status">status report</a> for more information.', array('@status' => url('admin/reports/status'))), 'warning');
     }
 
     // Set summary and description based on values determined above.