Hi there CPO Themes – and thanks so much for taking the time to get back to me.
I can confirm that the images are plenty big enough – and they are also the “Featured” image(s).
I am wondering if it is therefore possible that one of my custom CSS styles on my “Child” .css file is causing the rendering issue? (which is still present on my Windows 8.1 / IE11.x system).
The Site (and Slider) look perfect on all other browsers however! Weird.
Thanks again for getting back to – really appreciate it.
John.