Even though those screenshots show the style from before the days of the glorious StackExchange™ MultiCollider SuperDropdown™, those screenshots actually come from recent versions of the site: Yi Jiang is using a custom stylesheet.
Because this is the third time this has happened, I think I should post a question about it. Look at the screenshot above (click on it for the full size version).
It occurs when I visit a question. It happens incredibly rarely, maybe once every, I dunno, thousand visits to the questions page?
The system apparently thinks that I'm the question's OP, and even displays the notifications correctly. If I navigate away to any other page, everything gets back to normal. Clicking on the notification envelop, for example, gives a 404, as expected.
Edit: Well, this happened again. Here, have a look:
As you can see, votes are also exposed by this erm... bug? This is what I'm suppose to see (I didn't vote on either the comment nor the question)
Edit: Mr. Atwood, this happened again. Now what did you say about this been fixed? -1 smiley for you :(
So erm... what the hell is happening here?