This puzzles me. My old posts, which I moved from WP.com to W.org, have in some way been damaged. The images in each post are there. I can see them in the editor, but when I visit the site they all appear to be damaged.
The strangest thing is that this problem first occurs after i edit one of the posts and updates it.
https://postimg.org/image/kpkhl3jfb/
https://postimg.org/image/xuzzr7dav/