[![][1]][1]

Oddly enough, I'm only getting this when I click on the "questions" tab. I can open links to questions, go to "tags" page, successfully reach the home page by clicking on the logo etc.

I'm using Chrome version 44.0.2403.157 m, Win8 OS. (Reproduced on Firefox 39.0)
  [1]: https://i.sstatic.net/6xOFn.png