Index: modules/contact/contact.js
===================================================================
RCS file: /cvs/drupal/drupal/modules/contact/contact.js,v
retrieving revision 1.1
diff -u -p -r1.1 contact.js
--- modules/contact/contact.js	9 Oct 2009 15:39:12 -0000	1.1
+++ modules/contact/contact.js	9 Oct 2009 16:07:42 -0000
@@ -4,7 +4,7 @@
 Drupal.behaviors.contact = {
   attach: function(context) {
     $.each(['name', 'mail'], function () {
-      var cookie = $.cookie('Drupal.user.' + this);
+      var cookie = $.cookie('Drupal.visitor.' + this);
       if (cookie) {
         $('#contact-site-form input[name=' + this + ']', context).once('comment').val(cookie);
       }
Index: modules/user/user.js
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.js,v
retrieving revision 1.18
diff -u -p -r1.18 user.js
--- modules/user/user.js	21 Sep 2009 08:52:41 -0000	1.18
+++ modules/user/user.js	9 Oct 2009 16:07:42 -0000
@@ -188,4 +188,15 @@ Drupal.behaviors.userSettings = {
   }
 };
 
+Drupal.behaviors.registration = {
+  attach: function(context) {
+    $.each(['name', 'mail'], function () {
+      var cookie = $.cookie('Drupal.visitor.' + this);
+      if (cookie) {
+        $('#user-register input[name=' + this + ']', context).once('comment').val(cookie);
+      }
+    });
+  }
+};
+
 })(jQuery);
Index: modules/user/user.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/user/user.module,v
retrieving revision 1.1059
diff -u -p -r1.1059 user.module
--- modules/user/user.module	9 Oct 2009 15:39:12 -0000	1.1059
+++ modules/user/user.module	9 Oct 2009 16:07:43 -0000
@@ -3164,6 +3164,9 @@ function user_register($form, &$form_sta
     $form['account']['#type'] = 'markup';
   }
 
+  $form['#attached']['library'][] = array('system', 'cookie');
+  $form['#attached']['js'][] = drupal_get_path('module', 'user') . '/user.js';
+
   $form['submit'] = array('#type' => 'submit', '#value' => t('Create new account'), '#weight' => 30);
   $form['#validate'][] = 'user_register_validate';