Facebook users are being targeted in a scam that offers them a chance to install a "dislike" button. The scam tricks users into allowing a rogue application to access their profile page, which then posts spam messages. It also attempts to lure people into completing an online survey, for which the scammers are paid money.

You've got a few reasons to dread and/or loathe birthdays. But at least now you can cross that hot mess of a Facebook news feed off your list of things to worry about on your or your friends' birthdays. Facebook is now testing a new design that organizes birthday-related messages in a much cleaner, simpler way that's consistent with other recent user-interface changes.

A claim to have solved one of the most difficult riddles in mathematics has been challenged by scientists. Vinay Deolalikar, a mathematician based at Hewlett-Packard laboratories in California, US, claims to have solved the problem of P vs NP. This has been described as the biggest problem in computer science; it is one of seven Millennium Prize Problems set out by the Clay Mathematics Institute.

The sound of the 'Google Alarm' is hard to miss. Web users who install this browser plug-in hear a loud, buzzing noise whenever they visit a website that relays information to Google.
It might seem intuitive that Google tracks the Web activity of users who search for things at Google.com. But what's less obvious is that unassuming Web users might have their browsing behavior tracked on other sites, too.

Google is waving goodbye to Wave, a product which the company said would transform the way people communicate online. It blamed poor take-up by users of the service, which was launched to great fanfare just one year ago. At the time Google described the tool as "how e-mail would look if it were invented today".