MobileMe and RSS as Screen Savers

System Preferences/Desktop & Screen Saver/Pictures.

Is there a way to stop the Apple product ads from showing as one of my screen savers? I've tried several ways to eliminate them and haven't been successful. If the 'MobileMe and RSS'is checked, I see the ads; if the 'MobileMe and RSS' is not checked I get a message saying 'no pictures are selected'.