Looks like my latest answer caused trouble for some people (see revisions for details.) I'm so sorry about that!
So the edit says that somebody removed the bolding of kanji (which was on the word 羽織) to "correct severe rendering issue."
I was just curious to know what / how things got all messed up - because it was rendering just fine with furigana extension turned on here w/ Safari 9.1 on Mac OS X 10.10.5. Maybe emphasizing kanji also breaks the rendering, I guess?
And yes, no more bolding kanjis. I'll be careful next time.
p.s. I came across this post in which the asker claims that kanji renderings are murdering his eyes, Is this it?