So I was upvoting stuff on a post, right? I scroll down and for a moment I think I see the title of the post change in the search box. You know, the thing at the top of your screen that shows you the link.
I scroll back up and it's normal again, but I'm a bit suspicious. So I scroll back down and it changes again! AND GUYS IM NOT GOING CRAZY I TOOK A SCREENSHOT

This is on one of those "can we get ? answers" posts. Took another screenshot that explains it better:

I have to hold it in a certain place though to take the screenshot, because otherwise I reverts back. So you may have to do that, too.
This is very odd, perhaps it is some sort of easter egg?