Yesterday in my travels through Boro Park I was struck by 2 different signs regarding bread. One was in a subs eatery. It said: "All bread is now Hamotzi." Well, the fact of the matter is that bread is alway Hamotzi by definition. That is why mezonos rolls and bagels are misnamed and lead astray the halachically ignorant. Another sign that surprised me was one in a takeout place that informed buyers that all the challahs sold there were baked in a meat oven. Now, among the halachos associated with bread is an edict to keep it parve. That is so no one should stumble by making a deli sandwich on dairy bread, for example. The meat bread is a more unusual situation, though I would imagine it should also not be considered permissible. The only way it is considered acceptable to have non-parve bread is if the bread is marked in some way. So butter croissant could be acceptable as they are distinctive in appearance and would not likely be mistaken for regular rolls. But if a challah just looks like a challah, I can't see how it is OK to make it anything but parve.