FB seems to be picky when fetching a preview for a CGBlog entry with capitals in
them, it will also request the same url with lower capitals after the regular
url, can't find that last one and so it just comes up with the 404 as a preview.
Maybe we should make the new default URL Template
{$postdate|cms_date_format:'%Y'}/{$postdate|cms_date_format:'%m'}/{$title|lower}