Never mind my last post! Re the 16 vs 32 bit question, if I try to go with 32 bit in Photoshop, it tells me I'm going to lose all my adjustment layers -- so never mind that.
Also, I just tried it out with that one image (for starters), changing it to 16 bit, and it still looks the same (crappy) in ADE.
EDIT/UPDATE: Well, this is weird. I was starting to get worried about all my previous books, even though I'd tested them before and didn't recall any issues, I now wanted to check them to see if the images in those were also coming out weird like that -- but they're all fine.
I couldn't figure this out, was starting to wonder if there was something corrupt in my current book -- although the coding I used for those full-page SVG images was
exactly the same.
So I took this image that I used here (from Macbeth), plopped it into one of my old books, and here's a screenshot of it, side-by-side in a two-page spread with an image of a painting -- which looks just fine!
So I guess ADE has a problem with old engravings like that, where the lines are really close together, and that creates that moire pattern? Or more of an "interference pattern," if you ask me. Strange, though, as things look just fine in Photoshop, Sigil, and over on my iPad, it's only ADE that it looks like crap in. :/