As Carlton mentioned the mentions are now broken on both mobile and desktop (used to be broken only on mobile).
Also, please, please bring back the feature that clicking on a thread you've already read will automatically take you to the first unread. It currently takes me to the first post, then I have to hit last page, then scroll until it no longer looks familiar.
I also don't love the colors, but maybe I'll get used to them. No excuse these days for not meeting at least the bare minimum of accessibility standards though.