diff --git a/wp-admin/includes/update-core.php b/wp-admin/includes/update-core.php
index b8d2c1d43f..bfdb2b09ac 100644
--- a/wp-admin/includes/update-core.php
+++ b/wp-admin/includes/update-core.php
@@ -252,7 +252,78 @@ $_old_files = array(
 'wp-admin/js/list-table.js',
 'wp-admin/js/list-table.dev.js',
 'wp-admin/images/logo-login.gif',
-'wp-admin/images/star.gif'
+'wp-admin/images/star.gif',
+// 3.3
+'wp-admin/css/colors-classic-rtl.css',
+'wp-admin/css/colors-classic-rtl.dev.css',
+'wp-admin/css/colors-fresh-rtl.css',
+'wp-admin/css/colors-fresh-rtl.dev.css',
+'wp-admin/css/dashboard-rtl.css',
+'wp-admin/css/dashboard-rtl.dev.css',
+'wp-admin/css/dashboard.css',
+'wp-admin/css/dashboard.dev.css',
+'wp-admin/css/farbtastic-rtl.css',
+'wp-admin/css/global-rtl.css',
+'wp-admin/css/global-rtl.dev.css',
+'wp-admin/css/global.css',
+'wp-admin/css/global.dev.css',
+'wp-admin/css/install-rtl.css',
+'wp-admin/css/install-rtl.dev.css',
+'wp-admin/css/login-rtl.css',
+'wp-admin/css/login-rtl.dev.css',
+'wp-admin/css/login.css',
+'wp-admin/css/login.dev.css',
+'wp-admin/css/ms.css',
+'wp-admin/css/ms.dev.css',
+'wp-admin/css/nav-menu-rtl.css',
+'wp-admin/css/nav-menu-rtl.dev.css',
+'wp-admin/css/nav-menu.css',
+'wp-admin/css/nav-menu.dev.css',
+'wp-admin/css/plugin-install-rtl.css',
+'wp-admin/css/plugin-install-rtl.dev.css',
+'wp-admin/css/plugin-install.css',
+'wp-admin/css/plugin-install.dev.css',
+'wp-admin/css/press-this-rtl.css',
+'wp-admin/css/press-this-rtl.dev.css',
+'wp-admin/css/press-this.css',
+'wp-admin/css/press-this.dev.css',
+'wp-admin/css/theme-editor-rtl.css',
+'wp-admin/css/theme-editor-rtl.dev.css',
+'wp-admin/css/theme-editor.css',
+'wp-admin/css/theme-editor.dev.css',
+'wp-admin/css/theme-install-rtl.css',
+'wp-admin/css/theme-install-rtl.dev.css',
+'wp-admin/css/theme-install.css',
+'wp-admin/css/theme-install.dev.css',
+'wp-admin/css/widgets-rtl.css',
+'wp-admin/css/widgets-rtl.dev.css',
+'wp-admin/css/widgets.css',
+'wp-admin/css/widgets.dev.css',
+'wp-admin/includes/internal-linking.php',
+'wp-includes/images/admin-bar-sprite-rtl.png',
+'wp-includes/js/jquery/ui.button.js',
+'wp-includes/js/jquery/ui.core.js',
+'wp-includes/js/jquery/ui.dialog.js',
+'wp-includes/js/jquery/ui.draggable.js',
+'wp-includes/js/jquery/ui.droppable.js',
+'wp-includes/js/jquery/ui.mouse.js',
+'wp-includes/js/jquery/ui.position.js',
+'wp-includes/js/jquery/ui.resizable.js',
+'wp-includes/js/jquery/ui.selectable.js',
+'wp-includes/js/jquery/ui.sortable.js',
+'wp-includes/js/jquery/ui.tabs.js',
+'wp-includes/js/jquery/ui.widget.js',
+'wp-includes/js/l10n.dev.js',
+'wp-includes/js/l10n.js',
+'wp-includes/js/tinymce/plugins/wplink/css',
+'wp-includes/js/tinymce/plugins/wplink/img',
+'wp-includes/js/tinymce/plugins/wplink/js',
+'wp-includes/js/tinymce/themes/advanced/img/wpicons.png',
+'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/butt2.png',
+'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/button_bg.png',
+'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/down_arrow.gif',
+'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/fade-butt.png',
+'wp-includes/js/tinymce/themes/advanced/skins/wp_theme/img/separator.gif',
 );
 
 /**