You will have noticed that lately some pictures in posts do not work, images posted on the Postimage.org website.
For their problems, they have moved from postimg.org to postimg.cc, so, to see them again just correct the "old" address, where there is postimg.org, with the word postimg.cc, (remove .org and insert .cc).

Moderators can do this with all posts, while the authors of that post should click on "Edit Post" and make the correction.