Continuity mistake: When Silva gets out of the helicopter at Skyfall, the sky is approaching dark (7 o'clock to 8 o'clock sky). After throwing the grenades in the house and Silva says "Everyone listen to me! Don't you dare touch her, she's mine!" about 50 seconds later, it is suddenly pitch black (11 o'clock to midnight sky).
The title song "Skyfall" was the first James Bond theme to win the Academy Award for Best Original Song, and was the first to earn an Oscar nomination since the song for 1981's "For Your Eyes Only".