The problem is that the image address is rendered as //images-na.ssl-images-amazon.com/...
, but that server does not serve unsecured images. The OneBox rendered link doesn't specify a protocol, so it uses whatever your browser used to access the page
If you access SE chat via https
the images work. If you access chat via http
they don't. It's probably a better idea to access chat over a secure connection in general, but that URL is just broken. There is no such resource as
http://images-eu.ssl-images-amazon.com/images/I/51SuPiOnyIL._SL160_.jpg
but that's what the OneBox will render if your chat connection is unsecured. It should always use https
in the OneBox. That url:
https://images-eu.ssl-images-amazon.com/images/I/51SuPiOnyIL._SL160_.jpg
works fine.