Thanks for all the help.
It appears that some of it is basic operator error.
I forgot to have Pictureflow rebuild the cache. After I did that, almost all of the problems went away. Almost.
I still have a couple of covers that are being seen, I guess, but not scanned properly. They are just black & white streaks. They do show up on the wps screen, but again as black & white streaks.
I have double checked these. Simple jpgs named folder.jpg. I still replaced them with new jpgs, but no luck.
There is no embedded art (I tried to use the AA extractor, and it found nothing). Should I still delete all the files, or is this problem something else?
Again, thanks for the help.