Well, there is a terminal change involved at CDG (2F to 2C), but it's a single ticket, so not sure if I'll need to/be able to check in again. The connection time is three hours - which is a little scary for CDG if I have to check in again.
You don't need to check in again, AF will print all your BPs. But when you transit you need to go to the Jet counters and ask them if the upgrade cleared and then they will print a new BP for you.
