Laithwaites have gone to the trouble of creating an XHTML 1.0 Transitional site (with xml prolog!), but because they’re using a dynamically-generated css file (why? surely a periodic file build with cron would do?) which doesn’t send the right mime type, Firebird doesn’t render the CSS.
It seems that many MS-server-based webdev houses go all MS-only at the client too, never testing on anything but IE…