Yahoo has seen some fairly big shakeups within the company recently, and it looks like it's now also trying a change in tactics. As AllThingsD reports, Yahoo has today filed what's being described as a "massive" patent infringement lawsuit against none other than Facebook. That suit concerns ten patents in all, which cover everything from advertising and privacy measures to messaging and social networking itself. As detailed in the complaint (viewable at the source link below), Yahoo alleges that Facebook is infringing on those patents left and right, including in such core features as the News
