Index: wp-admin/edit-form-advanced.php
===================================================================
--- wp-admin/edit-form-advanced.php	(revision 18464)
+++ wp-admin/edit-form-advanced.php	(working copy)
@@ -202,7 +202,7 @@
 <?php if ( $message ) : ?>
 <div id="message" class="updated"><p><?php echo $message; ?></p></div>
 <?php endif; ?>
-<form name="post" action="post.php" method="post" id="post"<?php do_action('post_edit_form_tag'); ?>>
+<form name="post" action="post.php" method="post" id="post"<?php echo apply_filters( 'post_edit_form_tag', '' ); ?>>
 <?php wp_nonce_field($nonce_action); ?>
 <input type="hidden" id="user-id" name="user_ID" value="<?php echo (int) $user_ID ?>" />
 <input type="hidden" id="hiddenaction" name="action" value="<?php echo esc_attr( $form_action ) ?>" />