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WBOTM: So, where was your passport stamped (if anywhere) as entering the EU? Last time I flew CDG-MAD, there was no immigration at MAD. I haven't done CDG-BCN yet (but am doing ORD-CDG-BCN in two weeks).
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ka9taw: No stamp in either direction. In fact, my last 4 transatlantic trips have resulted in a total of 3 stamps (all from LGW immigration).
AF in BCN was very efficient. The ticket agent checked me through to IAH and provided a CDG transfer jacket (envelope) that included a map, general info and shopping coupons. On the outbound, CO just gave me a boarding pass for my connecting flight.