Joel Halblieb wrote:cork flavor.
Just to clarify definitions here, Joel, "cork flavor" (which is perceived in wine most often only in older Champagne), is a different matter from "cork taint" (which is a musty, mushroomy, "wet-basement" stench that results when wine, beer, liquor or other beverage comes in contact with a natural cork randomly infected with a fungus that, on exposure to the liquid, creates a stinky organic compound called tricloroanisole [TCA for short].) This has the effect of ruining the wine, and as I said further up the thread, it's certainly not unknown in cork-stoppered beer or liquor.
Brett has a good point about the taint being more perceptible in wine, although I'd say this is more a matter of wine's "transparency" of flavor rather than beer's perceived "boldness."
Either way, natural cork is a 17th century technology, and it's specifically because of this ongoing problem that we're starting to see more on more high-quality wine showing up in bottles sealed with metal screwcaps or synthetic closures.