Attached is a screen grab of the header of the same web page as seen with two browsers.
Safari (top) abruptly stopped filling the bloc with its background image, showing an oddly cropped version instead. Chrome (bottom) shows how it should look.
Quitting Safari and relaunching did not solve the problem, but clearing the browser history and relaunching did solve it.
This is the web page: concrete-egg-tank-2-1-1-1
