This is a related question on OneWorld to Europe (and also, after 3 months of being a spectator, my initial foray into FlyerTalk posting...)

As the first post mentioned, BA restricts mileage accrual on AA Translatlantic flights (and vice versa.) Does this affect other OneWorld members? For example, could I earn miles in my LAN account for taking a BA flight from IAD to Heathrow? Or does BA restrict accrual to only BA Exec. Club members on transatlantic flights?

Thanks...