Hi Rosali,
I think you had developed the captcha plugin for roundcube .. am having a doubt in your configuration ..
you are creating a cookie named as 'captcha_solved' from the file captcha.php..this makes the disapperance of captcha whenever the password condition fails ..
according to this screenshot , when i delete only the 'captcha_solved' manually using the browser..i suppose to get captcha and of course am getting it ..
would just post me something to delete this captcha and where i have to do that ..??
waiting for your reply