The following frames are from my cap of the French THX LD; the DVNR is not as obvious as the US Definitive Collection discs or the 2006 DVD but you can see the detail loss during movement. (Although probably made worse by my processing and MPEG-2 compression).
I seem to remember that Empire was even more noticable, I'll check that one next.
What do these scenes look like on the German Silver Screen discs?