When a piece of software is automatically installed on your computer without your knowledge, it's called malware. But what do you call it when Facebook apps are added to your profile without your knowledge? We discovered Wednesday that this is actually happening, and stopping it isn't as easy as checking a box in your privacy settings.

If you visit certain sites while logged in to Facebook, an app for those sites will be quietly added to your Facebook profile. You don't have to have a Facebook window open, you don't need to be signed in to these sites for the apps to appear, there's no notification, and there doesn't appear to be an option to opt-out anywhere in Facebook's byzantine privacy settings.

The apps appear to be related to Facebook's latest sharing features and tools. The sites currently leaving this trail all have Facebook integration, and the list includes heavyweights such as the Gawker network of blogs, the Washington Post, TechCrunch, CNET, New York Magazine, and formspring.me.

More: http://www.macworld.com/article/151087/

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