Index: simplenews.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/simplenews/simplenews.module,v
retrieving revision 1.220.2.22
diff -u -p -r1.220.2.22 simplenews.module
--- simplenews.module	30 Mar 2010 07:34:58 -0000	1.220.2.22
+++ simplenews.module	30 Mar 2010 14:02:20 -0000
@@ -830,7 +830,7 @@ function simplenews_user($op, &$edit, &$
         }
       }
 
-      if ($category == 'newsletter' && user_access('subscribe to newsletters')) {
+      if ($category == 'newsletter' && user_access('subscribe to newsletters') && isset($edit['newsletters'])) {
         foreach ($edit['newsletters'] as $tid => $checked) {
           if ($checked) {
             simplenews_subscribe_user($account->mail, $tid, FALSE, 'website');