I was looking through the "Sites" pane of the History window for an article I
read last week which was somewhere on "about.com", and I couldn't find it. This
was because the article was on "golf.about.com" so it was under "g" rather than
where I was looking for it which was under "a" and "www.a".

Three different ways of dealing with this that I can think of are:

- Add extra top domain entries for each subdomain, so that the top domain
"about.com" was an alias for all URLs in all of its subdomains ("*.about.com")
including "www.about.com".

- Internet Explorer makes all top domains expandable root nodes, so you can
expand "about.com" and get "www.about.com" and "golf.about.com".

- The easiest way might be to just drop all subdomains including "www." and only
use the top part of the domain (although that might confuse someone if they go
looking for "golf.about.com" and it's under "about.com").