Well, since all the hooplah here and numerous emails sent to Capella's, Perfumer's Apprentice and Flavourart, we now know that Capella's doesn't use diacetyl, nor does Perfumer's Apprentice. Flavourart is removing it from their flavorings now as well. It seems we may have done some good. If you haven't heard of Pure Vapes you might want to check them out. Nikhil runs Pure Vapes and he has been sourcing flavors that don't contain diacetyl and makes some of the finest e- liquid I've vaped.