I noticed the font used for the header/footer when "Document Default" is selected has changed, but I'm not sure if the change happened in 3.12.0 or earlier, and I'm not sure if it is for all devices or just the front-lit ones.
It used to be that selecting "Document Default" caused the Gothic font to be used for the reading header and footer. This was a bad choice, because Gothic had (and still has) a number of problems, including that it sits very low on the line (which makes the header and footer look uneven, the gap between bezel and header is larger but between bezel and footer is smaller), and tends to get cut off at the bottom if a very small custom footer is used.
Now it seems Georgia is used with "Document Default" instead, a much better choice.
|