Standard Oxwall Captcha is the set of numbers/letters displayed at the end of the join form to determine whether or not the user is human. It is also used when user sends several private message within a short period of time (“Mailbox” plugin).
If you see broken image instead of Captcha, first of all make sure that you have GD library with FreeType support enabled on your server as those are required to display Captcha.
file on your server via FTP
on Control Panel.
Find following line within config.php file:
Overall you should have
After saving changes open your website's homepage. Don't panic. Within the long list of tables with data find “GD”
If they are disabled, contact your hosting company and ask them to enable both for you
|Note: Don't forget to remove php>phpinfo(); code from config.php
Third party script
If GD Library with FreeType support is enabled on your server, but you still don't see Captcha:
in any browser. This page will display all Captcha related errors. If you are not sure what errors mean, contact Oxwall support team for assistance.
Deactivate all of your plugins one by one. Refresh join page after each deactivation.
Remove all Custom HTML
Make sure that TTfonts are configured on your server ( contact your host).
Search your server's error logs for anything related to Captcha.
Checking Oxwall's core files
Find original package (.zip) containing Oxwall software of the same version that is being used on your site. If your site uses 1.5.3- find original 1.5.3 package, if your site uses 1.4.2 - find original 1.4.2 package.
Compare following files from original Oxwall package with the ones currently used on your site:
If they are not identical, back up your own files and try replacing them by original ones.