Index: wp-admin/media-upload.php
===================================================================
--- wp-admin/media-upload.php	(revision 22570)
+++ wp-admin/media-upload.php	(working copy)
@@ -87,7 +87,7 @@
 
 	require_once('./admin-header.php');
 
-	$form_class = 'media-upload-form type-form validate';
+	$form_class = 'media-upload-form wp-upload-form type-form validate';
 
 	if ( get_user_setting('uploader') )
 		$form_class .= ' html-uploader';