I am experiencing problems with scratched film while using one of my MZ10 bodies. At first I thought it was dodgy film but I put a roll in another MZ10 and it was fine.
The lines aren't on every transparency but they are parallel and are the same width as the mechanism that moves the film on take up. I have tried giving the camera a thorough clean but no joy so it looks like a job for Pentax but I was wondering if anyone had experienced the same problem?