There have been a few times now when I come to the site, and see no questions at all.
Here is a screenshot:
Refreshing the page has no effect, nor does switching browsers, nor would (as far as I know) switching computers in any way - looking at the HTML of this blank page, the
<div> element with id
question-mini-list, which normally contains the questions, is simply empty.
The problem doesn't last long - 30 seconds at most - so it is difficult to distinguish "fixing" it and going away on its own.
Interestingly, the script that detects new questions / activity still functions correctly, so that
shows up after a while. It's also interesting that the featured tab still indicates its number, but I did not have the presence of mind to check whether the actual featured questions themselves were listed when that tab is switched to.