What can be the reason of this weird behavior I described in the subject?

I am an admin, and I am not asked to enter CAPTCHA when I post on our forum. However, another user of our forum is ALWAYS asked to prove that he is not a bot.

Is it a specific user setting, or a role setting? I could not find the option to configure this.

YAF.NET 2.2.3 BETA 20150822

Oh, sorry, found the general user setting in Administration » Host Settings, the Features tab. This is the "Enable CAPTCHA for Post a Message" check box.

That's funny that I knew nothing that this setting was applied to all users - because I'm an admin 😉