It's not as simple as that.

Thanks for that: this was the main information missing from the article...

But that means there is really no solution then, except not remembering which sites were
visited at all?

Mind you, the browser could apply (and report) the same style to visited and not visited
links, and add some local information (like special background) in the rendering of the
page...

Are there any sites relying on the visited links to render their page? Like: if you visited
the 'New stuff' page then the news are not the latest but the greatest kind of thing? I expect
some must do?