At the moment i have installed JoComment 4.0 on my site. Unfurtanly Captcha won't work.
The image doesn't display.
When i call the catcha.php by http://<domainname>/components/com_comment/joscomment/captcha.php i get a error like this:
Fatal error: Call to undefined function imagettfbbox() in /xxx/xxx/htdocs/components/com_comment/joscomment/captcha.php on line 50
Does any body know what is wrong?