Minnesota based Target Stores has been a victim of a security breach, according to Krebs on Security the breach appears to have happened between just after Thanksgiving possibly up to December 15th. The breach compromises info that is on the magnetic strip on the back of the card itself. It appears nearly all locations have been affected at this point.
For the article to go http://krebsonsecurity.com/2013/12/sources-target-investigating-data-breach/
There is no preventive info offered on the site but if you have shopped there recently and within the date range I would recommend calling your credit card company to keep yourself safe from any fraudulent charges. If you use a bank issued card, I would notify your bank of the issue so that you can try to protect yourself.
While this is an in person event and technically has nothing to do with technology, there is a reason I post this. I posted this because I want my readers to know about this potential issue because they get blindsided unexpectedly.