This is unbelievable. Just called up GP, where the rep confirmed that Raddisson is switching to 8:1 redemption; I also didn't ask about the May 1 vs. June 1 thing, as I wasn't about to take the chance on getting misinformation.

On the plus side, the rep. was very understanding; she had to get a supervisor to do the transfer (to BA) because of the amount involved, but called me back a few minutes later to give me confirmation numbers and an assurance that these transfers would go through at the 4:1 level.

Thanks for the heads-up, everyone. I would've been out basically one business-class ticket on BA to Europe had I not happened to read this today.