Hoi, When I try to log in, most of the time the server tells me, that I entered the wrong captcha. however, when I create a new circuit in tor, and resend the exact same data, I get logged in. Ergo, I entered the correct captcha in the first place, but my login was refused nonetheless. I think this may have something to do with how your server manages session data, which leads to one thread not knowing about session data from another thread.