Buttered Popcorn and Lesions

There have been recent reports on the dangers of buttered popcorn! Can you believe it? The brands being singled out are all with Butter: Orville Redenbaukers(sp?) and Act II. Most of the cases were regarding workers at the plant who contracted "popcorn lung", i.e., lesions on their lungs, some leading to cancer. Conagra's attorneys at Alfred E. Newman L.L.C., stated regarding these products, "what me worry?" and that they will change to a different non-lesion causing buttered popcorn ingredient ASAP. I guess they were worried..