Here is a photo emailed to me by one of the two people who has this problem: The imagine size is 2461 1055, which gives aspect ratio of 2.33, very close to theme specified aspect ratio.
Here is what one of those having the cut off Bottom line of Header sent to me today:
“It happens in both Chrome and Edge. But, if I click to make the browser window smaller, it displays correctly, but as soon as I maximize it, it gets cut off again. I think it may have to do with the display settings. My monitor is widescreen, and it is set to 1920×1080.
Everyone else I’ve had try this URL http://yolojuneteenth.org (which redirects into a page on https://davislibraryfriends.org, but not reachable from there) – sees the graphic just fine.
—I’ve tried several times to write a glowing review for your help, but keep getting told my Windows log in is wrong and they will send me a way to reset my password… Haven’t given up yet….