Okay, the website URL is:
http://interiordec.about.com/

On that page is an XML button, whose link is:
http://interiordec.about.com/gi/pages/stay.htm

That leads you to a page that shows how you can grab the headlines for email, Yahoo and RSS. Under the RSS heading is another XML button that has the following link, which is what I attempted to use.
http://z.about.com/6/g/interiordec/b/index.xml

So, what you seem to be telling me is that About.com has an incorrect link? Maybe, but, if so, what is the correct link and how would one find it? I'm only interested in the Interior Decorating articles.

Thanks for your help.

BTW,
I also have a similar problem for Topix.Net and the URI:
http://rss.topix.net/rss/home/decorating.xml

The URL for that is:
http://www.topix.net/home/decorating

Sincerely,
Don