== Problem with the ending == 

 I just watched this movie on Amazon, and I watched the ending twice to be sure.  After Kazan walks into the white light, the movie ends.  This never happened: 
 "Then the camera pans back to the room where Joan dies. She twitches and murmurs something about the cube being a triangle by logarithmic trigonometrical calculus, and the film ends in a flash of white." 

 If there is an alternate or extended ending to the movie, it needs to be identified as such, doesn't it?