Facebook denies that it may have accidentally exposed user data to advertisers and other third parties for several years. Security researchers at Symantec Corp. claim the leaks stemmed from a faulty API used by developers of Facebook applications. Facebook has been at the center of numerous privacy related issues over the past couple of years. The issue is unlikely to improve Facebook’s already battered reputation on the privacy front on the Internet. The Electronic Frontier Foundation says this kind of security failure is not the first of its kind in Facebook.”]