So I bought this thing and lo and behold!, the card art looks terrible!
All the cards (front and back) seem to have been printed from inferior jpg copies of the originals. You can see compression artifacts on all of them (look at the cart cards, especially around the cart icons) and the focus is all fuzzy-looking. Compare two similar cards from the original box and this expansion and you'll see what I mean.
What happened? If you mix the new cards with the ones from the regular Traders, you can spot them easily. I love the way Mayfair says "You have purchased a game of the highest quality" on the back of the rulebook. I now want to buy only games of the "highestest" quality, 'cause "highest" just doesn't do it.
At least, the tiles and other pieces are printed correctly, although the green paint job on the wooden pieces looks waaaaay different than the other green pieces.