I smell the cork, too, but it's kind of silly as the cork ought not to be wet, and certainly ought not to have been in constant contact with the contents, as a wine cork will have been. But I suppose it might well absorb some vapors.
I think we discussed once before the fact that screw tops tend to be rather flimsy, a concern when the bottle will be opened and closed many more times than a wine bottle, and will be on the shelf much longer. I am starting to think, though, that a well-designed screw top is the way to go. As in the wine industry, however, resistance to the traditional cork is strong. It has a long-standing association with quality in the mind, while the screw top seems to say "cheap". It will take an unquestioned quality leader to change the zeitgeist, one who will say "We use screw tops because we care about the product", and will have the credibility to be believed.