Clicking “reply” now means that only joint followers see the tweet even if you prefix it with a “.” (or anything else for that matter). You can still tweet at (@) someone with a “.@” construction and have all your followers see it but not if you click reply. When did this change occur? I cannot find anything on the internet that documents it. Is this the first post to do so?
I’m sure the change was well-intended, but this is a major screw-up. In other words, do not use the “reply” button—in any Twitter client—if you can help it.
(Via Hacker News.)