Index: program/steps/mail/compose.inc
===================================================================
--- program/steps/mail/compose.inc	(revision 50844277ca2ce9b98f5d732b07ffe7a4627ff72c)
+++ program/steps/mail/compose.inc	(revision 66e2bfa5507ebbbc73dc5fcabe511cd473e0c62a)
@@ -691,4 +691,5 @@
   }
 
+
 function rcmail_priority_selector($attrib)
   {
@@ -720,7 +721,11 @@
   list($form_start, $form_end) = get_form_tags($attrib);
   unset($attrib['form']);
+  
+  if (!isset($attrib['id']))
+    $attrib['id'] = 'receipt';  
 
   $attrib['name'] = '_receipt';
-  $checkbox = new checkbox(array('name' => '_receipt', 'id' => 'receipt', 'value' => 1));
+  $attrib['value'] = '1';
+  $checkbox = new checkbox($attrib);
 
   $out = $form_start ? "$form_start\n" : '';