Hi, Mikecav, I get the feeling that Hector the PopularPosts creator is working hard at this because his plugin is so popular. The issue of security is so great that it may be an industry-wide item. This happened around the same couple of days during which I was "herded" into upgrading my Microsoft Internet Explorer browser, and now some programs are firing off a Windows alert that the picture may be from a dangerous external source. I think that this may be because there is an industry-side agreement to embed certain identifiers into all pictures now and this has to be considered when doing editing of pictures.
Maybe we will learn what is going on now at some time in the future.
Myself, I can afford to use this period of "Missing Picture Link" on my blog as a time to remind people of the importance of Security, and of how we are all moving forward as efficiently as we can in a rapidly changing world. (While at the same time staying in a zone of feeling as safe as possible and not getting over-stressed.)
I hope that soon we will get a message that there is a new update to this forum thread, telling us how to get thumbnails onto our PopularPosts plug-in.
Unplugging now for a restful wind-down and sleep. Best wishes to all.