Is this a fairly recent rule change then?
Stewart->Jaguar->Red Bull
Tyrrell->BAR->Honda
Minardi->Toro Rosso
Jordan->Midland->Spyker->Force India
and indeed Sauber->BMW
all seemed to pass off without any fuss, only Brawn and now this BMW Sauber bollocks (that was a horrible name anyway, it should have been either just BMW or Sauber-BMW)