I just refreshed a couple of different SE sites & the Achievements drop menu seems to have gone all-bold.
I'm hoping that's not intentional.
After... [different Stack as I can't go back to the previous version]
Inbox affected too, but only for Unread items...
After comments - this appears to be a new accessibility feature [though currently buggy].
Could it be opt-in rather than compulsory, for those of use who don't need it?