EFF: Lenovo is breaking HTTPS security on its recent laptops
Here is a statement from the Electronic Frontier Foundation on the revelation that Lenovo has been shipping insecure man-in-the-middle malware on its laptops. "Lenovo has not just injected ads in a wildly inappropriate manner, but engineered a massive security catastrophe for its users. The use of a single certificate for all of the MITM attacks means that all HTTPS security for at least Internet Explorer, Chrome, and Safari for Windows, on all of these Lenovo laptops, is now broken." For additional amusement, see Lenovo's statement on the issue.

There are a lot of Lenovo users in LWN's audience. Presumably most of them have long since done away with the original software, but those who might have kept it around would be well advised to look into the issue; this site can evidently indicate whether a machine is vulnerable or not.