Well, here's the first scan from the roll developed today. I guess it's probably the fix, because that's the only thing I changed here.....I didn't have the benefit, when I developed this roll this morning, of this thread, so I was still being kind of sloppy about the timing and agitation of the fix. But with fresh fix, I guess I can get away with it (not that I'll be trying that! From here on out I will be more careful with my fixing procedure). This was a different film (Ilford FP4), so it's still formally possible it was an issue with the film, but that seems doubtful.