Validating www.redhat.com give errors like: * Line 164, column 50: ... let/website/ResponseForm?koEUU-VB09v3LIJHlmyLn-aw&rhpage= ^ Error: unknown entity "rhpage" See: http://validator.w3.org/check?uri=http%3A%2F%2Fwww.redhat.com%2F&charset=%28detect+automatically%29&doctype=%28detect+automatically%29 There are a couple of links which contains the character & which should be changed to &