It happened to me also at around the same time that it happened to you, blackjack-21. Furthermore, the text is now in Times Roman and much smaller as well.

I think this is more of a technical glitch than a personal settings issue. I agree that it is somewhat more difficult to navigate and differentiate between the different posts, but at least FlyerTalk is still fully functional.

Hopefully, this will be corrected on Monday or even sooner.