It appears that Betty Crocker/Gold Medal has reformulated the product back to having ascorbic acid. Regrettable.

ME,
Actually, I think it is a good idea to have the ascorbic acid in the flour because it acts as a dough strengthener and allows the dough to better retain the gasses of fermentation. In that respect, the ascorbic acid can be viewed as a substitute for potassium bromate in bromated flours even though it doesn't perform the same way as potassium bromate. I read a lot of ingredients lists for doughs, including pizza doughs, and the use of ascorbic acid has become quite common, possibly to avoid having to use bromated flours, which is an increasingly common concern among consumers at the retail level. It also gets around legal requirements in many states to disclose the use of bromates. The addition of ascorbic acid to the flour by the miller also spares me the need to determine the amount of ascorbic to add on my own. It is usually in parts per million.
Peter