The new look is visually richer and will look the same across platforms 鈥� be it mobile or desktop. In the past, they've grumbled about everything from small cosmetic tweaks to big changes in privacy policy.

Ayatollah Ali Khamenei turned to social media recently. Meanwhile, Iran's government has stepped up efforts to identify and target online pro-democracy activists. Analysts say the government is using increasingly sophisticated methods to shrink the online space for free expression.

Is the operating room staff Facebooking when they should be monitoring vital signs? The nurse anestheticists say that's a potential patient safety problem.

The hackers changed Burger King's bio, saying the company was sold to rival McDonalds because the Whopper had flopped. McDonalds tweeted "Not Us!" The hackers, however, brought Burger King 30,000 new followers.