Most of you heard about and possibly bought the Living Social deal. It has come to light that some of the Credit Cards used for this deal seem to have fraudulent charges on them now. The percentage is pretty low so it might be a coincidence. Still, you should check your statements and check for such charges. If there is a discrepancy, file a complaint with your credit card company. I think it's better to be safe than sorry so you should check.
Please Read: This Slickdeals Post for more info
Note: I have not had any fraudulent charges show up.