Facebook hole exposed 6M users' data -- but it's not what you think

Facebook's security blog Friday posted details of a recent information leak that affected as many as 6 million users. It's also in the process of emailing users hit by the bug to let them know about it. But it's not as serious as it sounds -- here's why.The problem was with Facebook's "download my information" tool, which as the name suggests allows you to download the data the social network has r...