* That might have been it... I can't test it now since I ended up uninstalling the KUAL menu. The whole KISS thing. If I wasn't using it, I figured I would just keep it simple, less chance of me doing irreparable damage to the Kindle down the line!
I thought I checked through each of the five or six font options, but it may have been two things going at once and I wasn't thorough enough - on the two or three I checked Caecilia, they were the exceptions and on the one that I didn't, it would have worked! Glad that at least it helped you see a place that someone might get slipped up!
* The publisher font option gives me the embedded font that I put in from Calibre. In this case, Droid Serif. That was why I wasn't sure if that option was coming from the Calibre embedding or from the Hack. I thought the Calibre embedding would just be automatic, but I have to embed it through Calibre then choose the Publisher font option in the Aa menu. Not that it is a big deal - it is easy enough to do. But just making note that it does need to be done may help someone down the line!