The scene where Lolita first "seduces" Humbert as he lies in the cot is a good 10 seconds longer in the British cut of the film. In the U.S. cut, the shot fades as she whispers the details of the "game" she played with Charlie at camp. In the U.K. print, the shot continues as Humbert mumbles that he's not familiar with the game. She then bends down again to whisper more details. Kubrick then cuts to a closer shot of Lolita's head as she says "Well, allrighty then" and then fades as she begins to descend to Humbert on the cot. The British cut of the film was used for the Region 1 DVD release.
The Criterion laserdisc release is the only one to use a transfer approved by Stanley Kubrick. This transfer alternates between a 1.33 and a 1.66 aspect ratio (as does the Kubrick-approved 'Strangelove' transfer). All subsequent releases to date have been 1.66 (which means that all the 1.33 shots are slightly matted).