--- simplenews_template.module	2009-01-31 20:32:48.000000000 +0000
+++ simplenews_template.module	2009-02-10 15:50:21.902518500 +0000
@@ -88,8 +88,7 @@
  */
 function _simplenews_template_mail_alter_simplenews_node(&$message) {
   // Setup newsletter data
-  $tid = reset($message['params']['context']['account']->tids);
-  if (!empty($message['params']['context']['account']->tids)) {
+  if (is_array($message['params']['context']['account']->tids)) {
     $tid = reset($message['params']['context']['account']->tids);
   } else {
     $tid = $message['params']['context']['newsletter']->tid;