The state of California is suing nine top food manufacturers, including Burger King, Heinz and McDonald's, over their reluctance to issue warnings that some of their snacks could contain the potentially cancer-causing chemical acrylamide...What the state of California is seeking is disclosure. Under California law (Proposition 65), companies are required to warn consumers about products that contain chemicals known to cause cancer or birth defects. Acrylamide has been on the state's list of potentially hazardous chemicals since 1990. [other companies being sued: Wendy's, KFC (part of YUM!), Cape Cod Potato Chips, Frito-Lay/Pepsi, Kettle Foods, Procter & Gamble]