We have a daughter with a severe dairy allergy and just got back from a long DW trip. Our daughter has had popcorn on all of our trips down there w/o any problems. We had been told there wasn't any dairy in our previous trips. We took the special diets sheet at face value this time, but you are right there is some butter flavoring/color on the popcorn that can't be just canola/coconut oil. Before I replied I thought I should do a web search. I found one allergy site article (go dairy free 2009) that said a vendor told them that the butter flavor on the popcorn had a dairy component. I found another site (Disney food blog 2010) that had a vegan vendor assure them that the popcorn is vegan (no dairy). I don't know if one is wrong or if they changed there butter flavorings, so you should probably ask a vendor when you are there. There may be a soy element in the butter flavoring, so I would ask about that also. If you find a definitive answer, please post it.