Anybody ever have New Glarus' Old English Porter? It had a distinct vinegar aroma. The taste was much more along a really nice oud bruin, with a little vinegar. Dan Carey told me several years ago that there was definitely vinegar production in there (and that he would never do it again due to the complaints). I personally thought it was one of the most interesting beers I have ever had, and quite tasty taboot. If De Bom made something like that, I would be very interested. However, I went with the Oud Bruin strain for my purchase.