WBH,
I recall that someone else once asked the same question on the forum but I couldn't quickly find the answer. But, based on what I recalled, the issue was one of what people outside of the U.S. refer to as pepperoni but with a different spelling and meaning (and maybe even pronounciation in some cases). I think this wikipedia explanation may provide the answer you are looking for:
http://en.wikipedia.org/wiki/Pepperoni.
Peter