hairy_hen said:

Now obviously I would prefer the subtitles not to be cropped by overscan, but I am prepared to accept that if need be, if complete authenticity requires it. (It's not like I don't know what the lines are, anyway.) I can't remember whether the current subtitles have been horizontally adjusted or not.

I tried to compromise the first time around to not have them appear outside the frame. But when I updated them to make them as close as possible to the real thing I noticed that the two most problematic lines were still inside the safe overscan area, at least on my old Sony Trinitron CRT TV. So, there shouldn't be any problem, hairy_hen. :)