? example.patch
Index: modules/aggregator/aggregator.admin.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/aggregator/aggregator.admin.inc,v
retrieving revision 1.7.2.1
diff -u -p -r1.7.2.1 aggregator.admin.inc
--- modules/aggregator/aggregator.admin.inc	25 Apr 2008 21:11:57 -0000	1.7.2.1
+++ modules/aggregator/aggregator.admin.inc	12 Aug 2010 11:01:03 -0000
@@ -210,7 +210,7 @@ function aggregator_admin_remove_feed_su
  *   An associative array describing the feed to be refreshed.
  */
 function aggregator_admin_refresh_feed($feed) {
-  aggregator_refresh($feed);
+  aggregator_refresh($feed, TRUE);
   drupal_goto('admin/content/aggregator');
 }
 
Index: modules/aggregator/aggregator.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/aggregator/aggregator.module,v
retrieving revision 1.374.2.6
diff -u -p -r1.374.2.6 aggregator.module
--- modules/aggregator/aggregator.module	28 May 2010 16:06:59 -0000	1.374.2.6
+++ modules/aggregator/aggregator.module	12 Aug 2010 11:01:03 -0000
@@ -580,8 +580,10 @@ function aggregator_element_data($parser
  *
  * @param $feed
  *   An associative array describing the feed to be refreshed.
+ * @param $admin
+ *   TRUE if called from the aggregator admin page.
  */
-function aggregator_refresh($feed) {
+function aggregator_refresh($feed, $admin = FALSE) {
   global $channel, $image;
 
   // Generate conditional GET headers.
@@ -600,7 +602,9 @@ function aggregator_refresh($feed) {
   switch ($result->code) {
     case 304:
       db_query('UPDATE {aggregator_feed} SET checked = %d WHERE fid = %d', time(), $feed['fid']);
-      drupal_set_message(t('There is no new syndicated content from %site.', array('%site' => $feed['title'])));
+      if ($admin) {
+        drupal_set_message(t('There is no new syndicated content from %site.', array('%site' => $feed['title'])));
+      }
       break;
     case 301:
       $feed['url'] = $result->redirect_url;
@@ -610,7 +614,7 @@ function aggregator_refresh($feed) {
     case 302:
     case 307:
       // Filter the input data:
-      if (aggregator_parse_feed($result->data, $feed)) {
+      if (aggregator_parse_feed($result->data, $feed, $admin)) {
         $modified = empty($result->headers['Last-Modified']) ? 0 : strtotime($result->headers['Last-Modified']);
 
         // Prepare the channel data.
@@ -639,12 +643,16 @@ function aggregator_refresh($feed) {
         cache_clear_all();
 
         watchdog('aggregator', 'There is new syndicated content from %site.', array('%site' => $feed['title']));
-        drupal_set_message(t('There is new syndicated content from %site.', array('%site' => $feed['title'])));
+        if ($admin) {
+          drupal_set_message(t('There is new syndicated content from %site.', array('%site' => $feed['title'])));
+        }
       }
       break;
     default:
       watchdog('aggregator', 'The feed from %site seems to be broken, due to "%error".', array('%site' => $feed['title'], '%error' => $result->code .' '. $result->error), WATCHDOG_WARNING);
-      drupal_set_message(t('The feed from %site seems to be broken, because of error "%error".', array('%site' => $feed['title'], '%error' => $result->code .' '. $result->error)));
+      if ($admin) {
+        drupal_set_message(t('The feed from %site seems to be broken, because of error "%error".', array('%site' => $feed['title'], '%error' => $result->code .' '. $result->error)), 'error');
+      }
   }
 }
 
@@ -694,10 +702,12 @@ function aggregator_parse_w3cdtf($date_s
  *   The feed data.
  * @param $feed
  *   An associative array describing the feed to be parsed.
+ * @param $admin
+ *   TRUE if called from the aggregator admin page.
  * @return
  *   0 on error, 1 otherwise.
  */
-function aggregator_parse_feed(&$data, $feed) {
+function aggregator_parse_feed(&$data, $feed, $admin = FALSE) {
   global $items, $image, $channel;
 
   // Unset the global variables before we use them:
@@ -713,7 +723,9 @@ function aggregator_parse_feed(&$data, $
 
   if (!xml_parse($xml_parser, $data, 1)) {
     watchdog('aggregator', 'The feed from %site seems to be broken, due to an error "%error" on line %line.', array('%site' => $feed['title'], '%error' => xml_error_string(xml_get_error_code($xml_parser)), '%line' => xml_get_current_line_number($xml_parser)), WATCHDOG_WARNING);
-    drupal_set_message(t('The feed from %site seems to be broken, because of error "%error" on line %line.', array('%site' => $feed['title'], '%error' => xml_error_string(xml_get_error_code($xml_parser)), '%line' => xml_get_current_line_number($xml_parser))), 'error');
+    if ($admin) {
+      drupal_set_message(t('The feed from %site seems to be broken, because of error "%error" on line %line.', array('%site' => $feed['title'], '%error' => xml_error_string(xml_get_error_code($xml_parser)), '%line' => xml_get_current_line_number($xml_parser))), 'error');
+    }
     return 0;
   }
   xml_parser_free($xml_parser);