I did a little looking but I haven't delved in to it deeply because I haven't had time. I just upgraded from 3.4.2 to 3.4.4 and my h1, h2 etc all changed to black inside of posts and pages.
I might just be missing something, but it has never happened with any other Atahualpa upgrade before. For the time being I've gone back to 3.4.2
(love the theme BTW, great to work with)