Hi folks, new on this forum. I'm considering switching from Beersmith to BF, but I have a problem with IBU calculations. For a given recipe, BS gives me 16 IBUs, but BF gives me 25 IBUs. Both programs use Tinseth. When I calculate the IBUs on http://www.brewersfriend.com/ibu-calculator/ I do get the same IBUs as BS. Any ideas why that may be?