By default for me site's font renders using severe sub-pixel anti-aliasing so it looks all colorful instead of good old Mac black and white. And it's very noticeable.

Dig the wave though, upvoted.

EDIT: and I think there's actually an issue... Somehow there are kinda vertical "bands" where the sub-pixel anti-aliasing shifts. Like I've got a few characters looking too green (on the entire vertical), then a band of pixels looking too red. Very strange. Firefox / Linux but others sites don't do that. First time I see those "bands" with a font using sub-pixel AA.

2nd EDIT: https://news.ycombinator.com/item?id=35866283 In that thread from 2023 on the same site, people are noticing the same weird rainbow/banding fx so it's not just my setup ; )