Not that I am aware of. They mint some pretty good bullion. I have one of the first one's I bought it on sale, To expensive for plain bullion for me. And if you have a problem or something you do not like they take care of me pretty good any ways.
I bought some from Provident during the sale event over the Holidays at 25.00. Walker and Black diamond buffalo.. was the only two I wanted.. they were proofs.... no spots