Anons. From what I learned at wrongthink's /operate/ thanks to Shiban, you have to find a board with captcha enabled on https://magrathea.endchan.net or posts won't work. If you don't see a captcha, hard refresh by [Ctrl]+F5 repeatedly until you do. If it never shows, that means the BO hasn't enabled captcha for all posts. Posting at the moment without captcha enabled for all won't work.