Index: wp-admin/user-edit.php
===================================================================
--- wp-admin/user-edit.php	(revision 3837)
+++ wp-admin/user-edit.php	(working copy)
@@ -73,7 +73,7 @@
 <h2><?php _e('Edit User'); ?></h2>
 
 <form name="profile" id="your-profile" action="user-edit.php" method="post">
-<?php wp_nonce_field('update-user_' . $user_ID) ?>
+<?php wp_nonce_field('update-user_' . $user_id) ?>
 <p>
 <input type="hidden" name="from" value="profile" />
 <input type="hidden" name="checkuser_id" value="<?php echo $user_ID ?>" />