(Minneapolis,  MN)  --  Target has another big headache to deal with from the holiday shopping season.  KMSP-TV reports the Minneapolis-based retail giant has thousands of gift cards sold that weren't activated properly, meaning they don't have any value.  Target is still reeling from a massive data breach that resulted in millions of customers being exposed to possible identity theft through their credit and debit card information.  A company spokesperson recommends calling the number on the back of the gift card for help.