Yes mate. Crikey, you had me worried for your motor then!
Shield has probably just dropped on its fixings a bit. Is it the full one that goes right to the back of the engine, or just the partial one that covers the radiator? Get your head under there and check the screws are all in place and that the shield itself isn't damaged.
If its becoming a problem whip it off. Might get a bit more road noise and dust in the engine bay is all.