Haha yeah, when I do it like that, it works. I didn't even think about clicking directly on the cards. I'm stupid like that.
For the sake of curiosity, though, why did I have radio buttons that worked perfectly fine at the beginning of the game ? Is it because the new interface wasn't fully implemented yet ? After all, I played a bit this morning and the old interface was still there, so I guess we're just changing interfaces as we speak ?
Anyway, thanks a lot ! Seems I was worried for nothing :)