The documentation can be confusing in terms of what values are accepted for a field. Sometimes this leads to entering an invalid setting and MantisBT fails to load which results in frustration and time spent trying to figure out what went wrong. The documentation could be made much clearer by including the type of value that is accepted for each field (i.e. string, boolean, integer, etc).

For example:

$g_custom_headers
(string array)

$g_allow_signup
(boolean)

$g_max_failed_login_count
(integer)

$g_notify_new_user_created_threshold_min
(string)