Index: trunk/wp-admin/edit-form-advanced.php
===================================================================
--- trunk/wp-admin/edit-form-advanced.php	(revision 15183)
+++ trunk/wp-admin/edit-form-advanced.php	(revision )
@@ -211,6 +211,7 @@
 <input type="hidden" id="originalaction" name="originalaction" value="<?php echo esc_attr($form_action) ?>" />
 <input type="hidden" id="post_author" name="post_author" value="<?php echo esc_attr( $post->post_author ); ?>" />
 <input type="hidden" id="post_type" name="post_type" value="<?php echo esc_attr($post_type) ?>" />
+<input type="hidden" id="parent_id" name="parent_id" value="<?php echo esc_attr( $post->post_parent ); ?>" />
 <input type="hidden" id="original_post_status" name="original_post_status" value="<?php echo esc_attr($post->post_status) ?>" />
 <input type="hidden" id="referredby" name="referredby" value="<?php echo esc_url(stripslashes(wp_get_referer())); ?>" />
 <?php