I was first alerted to this by Paul. There's a really useful Wiki for Runescape, which every player whom I know uses constantly. Since Sunday, when you search for anything Runescape related, you get anything but what you're looking for.
For example, go into Google and search 'Duradel + RS Wiki'. That's a major character in the game followed by the site name. It would have been the number one link before last Sunday. It would have taken you to the right page.
Now you get this:
Before everyone jumps up and down pointing at the 3rd and 5th entries, that isn't the right site. It's Jagex's failed attempt to usurp the popularity of RS Wiki by creating their own. The first three links are the right site, but the wrong page.
I've just encountered it here too. I tried to search for 'CCleaner + Wizzley', as I have an article about that, which I wanted to pass on to someone who'd find it useful. The correct link used to be the right one. Now it's gone. The first link is indeed one of my Wizzley articles, but it's only links to the CCleaner article. It's not a direct link. The whole first page of the SERPs is a list of other sites linking into my CCleaner article. But again, not the article itself.
That's languishing over on page two, under all of the website linking to it.
Wtf is Google doing? Is this the new look ripple effect SERPs? Why do two clicks, when you can do one? Weird.