I believe the photo posting problem has been fixed. However, any photos posted during the time the issues were happening, most of the time, are gone. They have to be reposted, it seems.
Basically, you would go to the post with the (missing) photo, and click on "edit" (lower middle left of post). Then go to "more options". There you can delete the image code (or whatever is in the place where the photo is, then upload the file to post there. Be sure to also "delete" the missing photo info below the post before clicking on "save changes".
Yes, it's a real pain to have to do this.