Thanks Paolo.
I can confirm that all my devices/browsers show the photos properly now. I really like how the Whoop theme looks on the iPad.
The problem you found is in the original Whoop theme archive I downloaded from your website. I just unzipped the file I downloaded over the weekend, called GeoDirectory_whoop_1.0.2.zip, and the style.css file is much smaller than the file you fixed for me.