Mine does the same as this, but the key will lock the driver's door, but not unlock it. Passenger side was fine for both. Does this suggest a worn key ?
I have a similar problem. In the winter I unfroze the drivers door lock by the kettle of hot water method. Since then the driver's side lock will lock, but not unlock. So I have been unlocking from the passenger's side. Yesterday I unlocked from the passenger's side, but the central locking...