Hi, you probably got some dirt on the matte screen (not sure about the English term, but I believe matte screen is the term for the "transparent screen with the focusing marks"). It's annoying but does no real harm. Sometimes I try to blow/brush away these dustspecks, but that's rather rare. Mostly I just try to forget about them. If you want to remove them, try an airblower with a brushtip. (The camera shall not be in sensor cleaning mode - just remove the lens.)