This is really a kde question but I'm hoping other gentoo users will know that to do here since it seems likely any kde users will have seen this too.
I've apparently set something so that visited links sort of disappear. That is, the color they turn almost matches the background. The settings for konqueror don't appear to cover that. Unless by means of style sheet. But anyway, it seems to be more general than just Konqeror so I'm thinking it is a desktop setting somewhere. I see the same behavior for example in knode (the kde newsreader) when a message is marked read it nearly disappears in the same way. Another thing hard to find documentation for is how to make konqueror start on a home page rather than just blank -- gentoo-user@gentoo.org mailing list