Why is there a big gap at the beginning of all the questions? (see illustration below) Note that the gap is not present in meta. Is this a bug, or an intentional stylistic feature?
I did further research by examining the HTML source for the page. It turns out that the gap is supposed to be occupied by an ad. Since I have an ad blocker enabled, I just see blank space.
It is not clear why the gap only appears on GIS and not any other SE sites for me. It is possible that an old or incorrect ad format is being fed to GIS for some reason.