More privacy, not less.
Facebook keeps trying to share our personal information with other websites. Even if you set your profile to private, if you're friends with someone who shares more than you do, Facebook will still share your information if you haven't gone through their convoluted privacy options.
Privacy Fix 1: Account --> Privacy Settings --> Applications and Websites --> What Your Friends Can Share About You: uncheck anything that you don't want your friends to be broadcasting to every "corporate partner" on Facebook.
Privacy Fix 2: Account-->Privacy ettings-->Applications-->Instant Personalization-->uncheck "Allow", then click "Confirm" when they try to talk you out of it.
Privacy Fix 3: Account --> Privacy Settings --> Friends, Tags, and Connections --> Change the settings for the new categories.