Don't know whether this is a bug (so feel free to ruthlessly hide me), but the new sidebar thing: Can I make it go away?

This is on iPad, yes? @samuel.bsky.team can correct me if I'm wrong, but I believe it should go away if you turn your iPad so that it's vertical instead of horizontal (or resize the window so that it's less wide)

No — it's a Macbook. The sidebar does go away on the laptop if I resize, but I'm for some reason deeply disconcerted by the new smaller viewing pane. There's a good chance that, as of, say, later today, I won't notice the sidebar anymore, so I've decided panic is probably unnecessary.

Oh, how interesting! I use Bluesky on my MacBook, and I haven't seen any change: that column has always been there. I wonder why it's different for you! Is yours a very small one, e.g., 12-inch? Anyhow, apologies for prolonging this, and as you say, I'm sure you'll stop noticing it in a few hours

It's not a very small one — I've always zoomed in a bit on Bluesky, and now I'm wondering whether I did that initially to get rid of the sidebar. Now, at the same magnification, the sidebar is there. I can make it disappear if I go EVEN BIGGER, but that makes posts look as if they're yelling at me.

have you tweaked your font size in Appearance settings? bsky.app/settings/app...

That is a sensible question — the kind of question no one should make jokes about. (I made the font size small, zoomed out more, and now it looks pretty much exactly like it did before. So thank you!)