I'll be honest; I'm definitely not a beer expert. I'll be brewing my first batch this upcoming weekend, so I'm a total n00b in that regard. In the meantime, I've been sampling several beers from local breweries (research!) and collecting bottles.
Two of the recent beers I've tried (Squatters' Cottonwood Amber Ale and Uinta's Bristlecone Brown Ale) have had an odd aftertaste. I can't quite put my finger on the flavor, but it's reminiscent of what wet cardboard smells like. I don't know if it was improper handling, bad batch, or just a flavor that's common for the styles (like I said, not an expert), but it's definitely a flavor I want to avoid in my brews. I know my description is vague at best, but what would cause such a flavor to be present in a beer?