About a year-and-a-half ago I wrote a post that suggested that when you upload your profile avatar to Twitter it needs to a big image. Not enormous, but a decent size: say, 400×400 pixels.
Why? Because when people visit your profile and click on your avatar, they expect to see something larger appear. That’s the way the internet works – images are scaled down to fit into a given space, but if they’re clickable we expect them to get bigger. While Twitter automatically scales down your avatar to a 48×48 thumbnail for people’s streams, your profile image scales up to 128×128, and when you click on that you instinctively expect it to get even bigger, because there’s been a progression there.
This used to be what happened. But now, all of a sudden, when you click on an on avatar on a typical profile page the image doesn’t get bigger it all. It gets smaller. And it all looks a bit daft.