style.css now checks for a builtin file named after the first path component of the referer (sic), rather than PD("name"), however, we still have to emit style.css/PAGENAME in $stylesheet_url in order to pick up the the page-specific CSS, otherwise /style.css?id=... is the same for all pages and a page with its own style may pick up a cached copy without its own styles, or with the styles from another page.