The launch of its grilled chicken meal was a pr mess due to a coupon shortage, but the new, healthier product helped turn around KFC's declining U.S. sales.

So extreme that KFC President Roger Eaton had to write a note of apology to would-be freeloaders who flocked to Oprah's Web site to download their coupons.

Sometimes a mention on Winfrey's show can generate too much interest. That was the case with a coupon offer for KFC's grilled chicken.