I was browsing, as I usually do, answering, commenting, etc.
I'll admit, I'm working on a badge that involves a lot of voting, so I've been trying to view as many questions/answers as possible, up and down voting as I see fit.
Now, when I try to view a question, I get this error screen:
Everything else on the site works fine, I can click on and navigate through every other area. When I try to view a question, though, I get the error.