Yes, the Markdown-syntax images are being cherry-picked from the same "images" folder that contains the <img> tag images. Both my previewer apps can see all the images, so they're all accessible. I just don't know if it's a known thing that calibre isn't designed to do, or if I'm doing something screwy on my end.
Thanks for the heads-up on Textile; I hadn't thought of that. It turns out that my previewer app
Marked can use a Textile engine for its display, so that's a minimal disruption of my workflow. Should be very interesting to try. Now I've just got to start from square one again and learn the syntax...
