Or maybe the film just gets shortened by 1/25... ie a 90 minute film last 3.6 minutes less time when shown on TV? <<< Correct. Films in Euopean TV run 4 percent shorter than on film or in US TV. [NTSC 30fps is far enough from 24 to be noticeable, so there is an adjustment to make the film take the same length of time... showing some frames (well, some fields) twice]