I don't know about other stores but if you bought it at Wal-Mart (Great Value is Wal-Marts brand) you can take it back to W-M. I just got a refund on one jar each of Peter Pan and Great Value. No questions asked.
I walked back to the peanut butter aisle and they were removing both brands from the shelf.
"If consumers have this product, they should discard it, but save the product lid. For a full refund, consumers must return the Peter Pan Peanut Butter or Great Value Peanut Butter product lid along with their name and mailing address to ConAgra Foods, P.O. Box 57078, Irvine, CA 92619-7078."
This doesn't work for me. The product code was on the can, not the lid. Oh well. Maybe I'll try to cut into the can. Or maybe I'll just let it go. I really don't want to mess with it! I'm sure they are hoping that everyone will be as lazy as I am!!