There has been some debate regarding Kubrick's prefered AR. The reason he insisted in releasing his films 1.33:1 for home video, was, like bgart said, his fear of pan & scan. The films, except his early noirs were clearly shot for widescreen exhibition though. In the early home video releases you can see the shadow of the helicopter in the beautiful aerial tracking shot that opens The Shining for example, which was obviously not intended. Also there is the note from Kubrick that was included with , I think, the film prints of Barry Lyndon, with detailed exhibition instructions. He was very anal about this stuff.