There's an article in the current issue of National Geographic Traveler about how most credit cards in Europe are "smart cards" with embedded chips -- and how as a result US credit cards with their magnetic swipe strips don't always work when you need them to, especially in self-service machines. The NGT article suggests getting a prepaid "smart" debit card from a local bank, but that's an extra layer of hassle and fees.
Has anyone encountered problems using their US credit card at a ticket machine, a gas station, a parking meter, etc.? How did you deal with it? I'm heading off in 3 weeks for a month-long multi-country trip, and I'm a little concerned that the only way I'll be able to get train tickets, etc., is to queue up and wait a million years to be helped by a human. And I HATE waiting in line.