You know, it's a shame that http://bitsy.sub-atomic.com/~fianna/ars/'s sub-pages are now using what seems to be an obsolete form of HTML. I had to go into the page source to get a new copy of the house rules. Anyway, it's fascinating to read David Chart's 3rd edition house-rules, and how they clearly influenced the game moving into 4th edition.
It's not an obsolete form of HTML. It's a comment in the beginning of the page that hasn't been properly closed. Consequently, the whole page is only comment, so nothing's rendered...
Delete the comments between and , and it should display just fine. If you plan on downloading all those pages, you want to add a to point to the directory you put the files in, as well.