Heaven forefend! I found this out via
kalibex and verified through other sources. Hershey's has petitioned the FDA to allow them to substitute various vegetable oils for cocoa butter and milk protein concentrates for whole milk (in the case of milk chocolate). Having high fructose corn syrup in everything is bad enough -- but if you don't use cocoa butter in chocolate, it shouldn't be allowed to be called chocolate.
Anyway, this is a fairly fun cause, compared with the many other more serious ones out there. It's easy to add your voice against the change. Go to
http://www.dontmesswithourchocolate.com/ and follow the instructions. We've got until tomorrow to make noise about this.