Safari build 60 is out. Many things are fixed. Some things are not yet fixed. I have re-tested all of my Safari CSS hacks and found no differences between build 51 and build 60; specifically, the Safari Spacer Hack still works. (44 words) [dive into mark]
The selfish good news from my point of view is that RFB is now rendering legibly, so I don’t have to muck around with my planned redesign any time soon, at least not to appeal to Safari users.