Index: wp-admin/page.php
===================================================================
--- wp-admin/page.php	(revision 11951)
+++ wp-admin/page.php	(working copy)
@@ -117,20 +117,6 @@
 	include('edit-page-form.php');
 	break;
 
-case 'editattachment':
-	$page_id = $post_ID = (int) $_POST['post_ID'];
-	check_admin_referer('update-attachment_' . $page_id);
-
-	// Don't let these be changed
-	unset($_POST['guid']);
-	$_POST['post_type'] = 'attachment';
-
-	// Update the thumbnail filename
-	$newmeta = wp_get_attachment_metadata( $page_id, true );
-	$newmeta['thumb'] = $_POST['thumb'];
-
-	wp_update_attachment_metadata( $newmeta );
-
 case 'editpost':
 	$page_ID = (int) $_POST['post_ID'];
 	check_admin_referer('update-page_' . $page_ID);
Index: wp-admin/post.php
===================================================================
--- wp-admin/post.php	(revision 11951)
+++ wp-admin/post.php	(working copy)
@@ -156,21 +156,6 @@
 
 	break;
 
-case 'editattachment':
-	$post_id = (int) $_POST['post_ID'];
-
-	check_admin_referer('update-attachment_' . $post_id);
-
-	// Don't let these be changed
-	unset($_POST['guid']);
-	$_POST['post_type'] = 'attachment';
-
-	// Update the thumbnail filename
-	$newmeta = wp_get_attachment_metadata( $post_id, true );
-	$newmeta['thumb'] = $_POST['thumb'];
-
-	wp_update_attachment_metadata( $post_id, $newmeta );
-
 case 'editpost':
 	$post_ID = (int) $_POST['post_ID'];
 	check_admin_referer('update-post_' . $post_ID);