With Safari 5.1.4 on Mac OS 10.7.3, the color transitions for question links already visited (from orange to black to gray) appear broken, in that they do not behave consistently.
Namely, if I move my mouse slowly over a link, then move it out, it does orange → black → gray, then gray → orange on hover-out. On the other hand, if I move faster, the links ends up black and does not turn back to orange.
