I only marked the ones you mentionned... but maybe I did not start from original files... I need to check that :-/
[Edit]I uploaded brad new captcha_factory and the other one, then applied the "public static" where you told me, and this is what I get:
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_recaptcha::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_recaptcha::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 89
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_gd_wave::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_gd_wave::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 85
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_nogd::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_nogd::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 85
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_qa::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
Strict Standards: Non-static method phpbb_captcha_qa::is_installed() should not be called statically in /home/site/forum/includes/captcha/plugins/phpbb_captcha_qa_plugin.php on line 135
Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_qa::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 89
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_recaptcha::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_recaptcha::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 89
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_gd_wave::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_gd_wave::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 85
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_nogd::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_nogd::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 85
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_qa::is_available() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 83
- Strict Standards: Non-static method phpbb_captcha_qa::is_installed() should not be called statically in /home/site/forum/includes/captcha/plugins/phpbb_captcha_qa_plugin.php on line 135
- Strict Standards: call_user_func() expects parameter 1 to be a valid callback, non-static method phpbb_captcha_qa::get_name() should not be called statically in /home/site/forum/includes/captcha/captcha_factory.php on line 89
I will look closely after dinner

thanks for your help
