This page has cropped up at the BBFC (British Board of Film Classification):
Now as far as I'm aware Nashville has never had a DVD release in the UK - I certainly can't find one.
But the important thing here is that, if you click on the 'Details' tab it has a running time of 160m 9s. This is important because that's the original cinema running time. Had Paramount presented a PAL DVD copy to be classified it's have had a shorter running time due to PAL speed up - probably about 8 minutes shorter, so it looks like they presented a 24fps version.