Methods, systems, and computer program products are provided for administering incompatible content for rendering on a display screen of a portable media player. The cured compositions help protect the naphthalate polyester from UV exposure and other weathering effects. The teeth may be symmetrically or asymmetrically placed about the tube axis when viewed in a plan view. A user can push on the back of the earpiece to eject the earpiece from the phone housing so that the earpiece can be easily inserted into the user’s ear. Stationary subjects and lighting changes appear as lines parallel to one of the vertices.