I don't like that generally the newest version of Mastodon, looking at other instances, is maybe trying to more be inviting to Twitter users. It has trending now! Don't you want to engage with the popular stuff, like all the normies~?
... man I still wish shorter-than-wide images were collapsed vertically though. At least on awoo, any image I post always takes up a full 16:9 space.
Current solution works, but - with letterboxing on - it introduces a small space underneath any short images, and doesn't centre tall images.
With letterboxing off the small space vanishes, but instead seems to cut off rounded corners instead. May have other weirdness too, hrm.