Just as mainstream people are starting to recognise that high fructose corn syrup is in virtually everything (rice crispies!) and that it's not good for you (causes cancer in rats!) the powers that make it want to change the name. The producers feel that high fructose corn syrup is too difficult for consumer brains and want to change the name to the simpler (and less evil sounding) corn sugar.
Article here. Evil all around. It tastes funny too.