I think I have finally managed to get WordPress to show a preview image on the main page, as well as an image inside the post. It’s a picture in the post, and a featured image, but if you use both, then you have a duplicate picture in the post. If you don’t use a featured image, the main page shows only a title, not an image. If you use a featured image, but no image in the post, then you have a blank post. What the fuck? So, I’ve done some voodoo on WordPress and I think I finally have it working the way I want it, at least until something gets upgraded and it breaks again.