Doc, what has your avatar once again changed to an actual picture? It's changed back and forth many times recently....
I have changed it once and
only once, from the "circle T" that was the default icon, to the picture. If you think it has changed more often than that (back and forth?), it is either your browser having a cache problem or you are smoking something I would rather not try.
I did that icon change because I had an old, much smaller thumbnail image in the old forum that only showed up if you opened my profile. (And to be honest, it wasn't that good a picture.) When we switched to Xenforo, that old image didn't make it across so I finally decided to find a family picture. When I did, I cropped it as close as I could to the suggested size and uploaded the image.