PUBLIC MARKS from Hiéroglyphe with tag bug

A number of problems resulting from the use of the text/html MIME type in conjunction with XHTML content are discussed. It is suggested that XHTML delivered as text/html is broken and XHTML delivered as text/xml is risky, so authors intending their work for public consumption should stick to HTML 4.01, and authors who wish to use XHTML should deliver their markup as application/xhtml+xml.