On more than one occasion visiting the main site, I've been told there are no questions. This is what it looks like, complete with the obligatory freehand circles:
I don't know how that page is generated: this result means it looks like it's generated by my browser submitting a request to populate the results (using AJAX) which is coming back empty. That could mean a fault in any number of places in the chain connecting my browser to the SE database. However, examining requests using Chrome's developer tools or Firebug in Firefox doesn't support that methodology. It appears it's generated server-side and served as a static page.
If that is the case, then the server-side query — made by the SE engine on its database — is returning no questions.