Drupal has modules (Import HTML and its helper Static HTML together make up one option) for importing static (X)HTML pages into its database and it needs HTML Tidy in order to work. Since I am playing with the thing on Windows, I went out and snagged the version for that OS. Being either lazy or bloody-minded, I tried an XHTML page with PHP code embedded in it and, needless to say, the thing choked. I must try it with plain XHTML instead.