So this has happened to me twice now and I just don't get it. The first time was with a Saison and this time it's my IPA. Coincidentally (or not?) these are the only two light colored beers I've made so far. My stout, scottish ale, brown ale and dubbel all turned out fantastic. I tasted both the Saison and the IPA on bottling day and was really excited because they both tasted great. Sadly, after carbing up, they both ended up tasting horrible. It's the same flavor with both beers and I can't describe it. The beer tastes good at first but finishes with this nasty aftertaste that is really pronounced when you exhale. Yes the flavor fades after a few weeks so most people will just say it's green and I should give it more time and with the Saison I believed that. However, it just doesn't make sense that the beer would taste great on bottling day but horrible after carbing up. It shouldn't happen. My other beers tasted great before and after they were carbed but these two tasted great UNTIL they were carbed. Anybody had a similar experience? What could this be?