That was a surprisingly easy solution: On the Post-Graduate College’s homepage that I coded one sometimes had more than one scrollbar to navigate the contents of a page – which was pretty confusing. After setting up the page and doing the initial corrections and adaptations I was not especially eager to do even more work on this page so this issue has been lingering for some time. But not anymore! It was an easy fix, I just had to change the overflow attribute of the div elements that I was using to format the layout: I had set them to auto, putting trust into the browser’s abilities to do the right thing; now I changed it to visible and the additional scrollbars disappeared.