A good news update to the posting. As they had previously promised, a representative for Rail Europe called me yesterday on the day when the reservations for the last of my train segments in Spain became available for purchase on the Renfe site. With her on the phone I looked at the trips I wanted to take on the Renfe site and decided it was cheaper (by about $200) to purchase them individually rather than on a Rail Europe pass. She booked the trips for me, charged my credit card and emailed me the tickets for me to print. Factoring in the exchange rate, I paid almost exactly what Renfe charges in euros. I don’t think R.E. would have any problems doing the same for everybody, so if you guys have problems with Renfe and US credit cards, just call R.E. directly and ask them to book the tickets for you.