Originally Posted by eureka
I tried to find whether there is another, new [hidden] way to support alternative fonts without jailbreak but I've failed. It's possible that such a way exists (or maybe old way should be just slightly changed). But... at the moment I'm agreeing with you that USE_ALT_FONTS method had been removed from stock firmware.
My Paperwhite magically started doing it after the update to 5.3.0, with the files I had left on it from my previous test (copied verbatim from my Touch). Seems to work for me.