Extending on an observation here: https://www.askwoody.com/forums/topic/kbnew-new-articles-in-microsofts-knowledge-base/#post-162903
Opened here as best guess to highlight @bellelyn’s described experience in Chrome. I guess I had thought this was a known issue among MVP’s. If it is not, then I wanted to give it due attention.
I can add that my Pale Moon browser has, for an unknown period greater than one month, consistently identified the AskWoody homepage, both with and without the trailing / divider, as hosting mixed content. By default, Pale Moon blocks active content that is not trusted. There is no popup indication. But clicking on the shield shaped flag gives options to learn more, and a selector to allow the content. I presume that too would revoke the https label.
I initially thought this had to do with personal avatars. But the condition only exists on the homepage. All additional pages are fully compliant with https, including all pages with comments that host avatars.
Is this experience seen by others? Is it a known issue? Is it normal and easily explained?