OK, this is an interesting one. There is an image icon in forum page footers (the bottom of each page), that looks like a black rectangle. A look in the developer's tools shows that it's an image of an iPad:
Anyone else see this? I see it in Chrome and Firefox.
I'm running Chrome v96.0.4664.110 and FF 95.0.2, on Win10.
I think there's bad syntax in the page code.