Facebook now shares what you buy on certain sites

NEW YORK (AP) — Some users of the online hangout Facebook are complaining that its two-week-old marketing program is publicizing their purchases for friends to see. Those users say they never noticed a small box that appears on a corner of their Web browsers following transactions at Fandango, Overstock and other online retailers. The box alerts users that information is about to be shared with Facebook unless they click on "No Thanks." It disappears after about 20 seconds, after which consent is assumed.

http://ap.google.com/article/ALeqM5j...NS_6gD8T299HG0

Basically, don't stay logged into Facebook if you don't want people to know what you're purchasing.

I wasn't able to find a list of which sites are part of this.