The scratches are similar to scratches I got on roll I had processed by a local lab this summer. The scratch wasn't real straight and wandered across multiple frames so I don't think it was a problem with the camera. To make matters worse, I could see what looked like water marks in the sky in a number of my images. Then to top it off, I asked the lab to make a CD scan of the slides and that turned out to be one of the worst scan jobs I've seen.
I mentioned the problems to the lab, but not sure if it did any good.
So on my last roll I decided to mail it off to Dwayne's and I was pleased with what I got back, but I would prefer to patronize my local lab.