Index: wp-admin/async-upload.php
===================================================================
--- wp-admin/async-upload.php	(revision 20468)
+++ wp-admin/async-upload.php	(working copy)
@@ -51,7 +51,7 @@
 
 $id = media_handle_upload('async-upload', $_REQUEST['post_id']);
 if ( is_wp_error($id) ) {
-	echo '<div class="error-div">
+	echo '<div class="error-div media-upload-error">
 	<a class="dismiss" href="#" onclick="jQuery(this).parents(\'div.media-item\').slideUp(200, function(){jQuery(this).remove();});">' . __('Dismiss') . '</a>
 	<strong>' . sprintf(__('&#8220;%s&#8221; has failed to upload due to an error'), esc_html($_FILES['async-upload']['name']) ) . '</strong><br />' .
 	esc_html($id->get_error_message()) . '</div>';