PHP 4 Incompatability

array_combine() is a PHP5 only function.

Required in:
• phrase_captcha.module
• word_list_captcha.module
• random_captcha_type.module

Fix (found it through google in http://drupal.org/project/money module, who in turn borrowed it from somewhere else):

//----------------------------------------------------------------------------
// PHP 4 compatibility.

/**
 * Replace array_combine().
 *
 * Borrowed from PHP Compat 1.5 (http://pear.php.net/package/PHP_Compat).
 */
if (!function_exists('array_combine')) {
    function array_combine($keys, $values)
    {
        if (!is_array($keys)) {
            user_error('array_combine() expects parameter 1 to be array, ' .
                gettype($keys) . ' given', E_USER_WARNING);
            return;
        }

        if (!is_array($values)) {
            user_error('array_combine() expects parameter 2 to be array, ' .
                gettype($values) . ' given', E_USER_WARNING);
            return;
        }

        $key_count = count($keys);
        $value_count = count($values);
        if ($key_count !== $value_count) {
            user_error('array_combine() Both parameters should have equal number of elements', E_USER_WARNING);
            return false;
        }

        if ($key_count === 0 || $value_count === 0) {
            user_error('array_combine() Both parameters should have number of elements at least 0', E_USER_WARNING);
            return false;
        }

        $keys    = array_values($keys);
        $values  = array_values($values);

        $combined = array();
        for ($i = 0; $i < $key_count; $i++) {
            $combined[$keys[$i]] = $values[$i];
        }

        return $combined;
    }
}

-- first issue, so hope i did the right status