Works after a little tweek

Great little plugin (can’t believe this basic functionality isn’t part of the WordPress core)

I did have some trouble when I first installed it on WP3.6 when clicking Update on the edit media screen a little red box appeared next to the plugin’s filename field.

I did some digging and for whatever reason the ajax response was returning a CRLF before the success code. Not sure if this was wordpress doing this or the plugin itself.

Anyway, quick 1 line fix, in the class-media-rename.php file on line 107 simply insert ob_clean(); just before the echo so the function becomes;

function ajax_rename() {
	if (check_ajax_referer('media_rename', '_wpnonce', 0)) {
		$retitle = $_REQUEST['type'] == 'rename_retitle';
		ob_clean();
		echo $this->do_rename($_REQUEST['post_id'], $_REQUEST['new_filename'], $retitle);
	}
	exit;
}

Hope it helps.