We did encounter one significant black level snafu. When we engaged the "Cinema Smooth" mode in the Film Mode menu, which is designed to help preserve the correct frame rate of film with 1080p/24 sources, black levels rose significantly. It was as if the TV had switched to another, uncalibrated picture mode. Switching Film Mode back to Off didn't return the black levels to their correct, calibrated state; to do so we had to stop playback entirely, which sent a normal 1080p/60 source to the TV and disengaged Cinema Smooth. Needless to say this is unusual behavior, and we'll update this review when Samsung has an explanation (and hopefully a fix). In the meantime, we recommend not using Cinema Smooth with our picture settings.