 1) When I open any of the calendar's scripts in my browser, the following error
    message appears on the page:

    Warning: Cannot add header information - headers already sent by (output
    started at /path/to/my/htdocs/nikki.conf.php:42) in
    /path/to/my/htdocs/nikki.inc.php on line 32

Answer: 

    O-Kiraku Nikki sends a HTTP header to the browser telling it that the page
    is in the UTF-8 encoding. This header must be sent before any HTML code.
    Most likely there's some HTML output in your script before the require()
    line. Please note that empty lines (lines containing only a carriage return)
    in HTML mode (outside of a PHP block) are treated by the PHP interpreter as
    HTML.

    If you really need to send HTML code in your script before require()'ing
    nikki.conf.php, please turn on output buffering in your script:

    http://www.php.net/manual/en/function.ob-start.php

    Version 1.1 had a blank line at the end of nikki.conf.php, and the error
    message was displayed if you didn't turn on output buffering. (thanks to
    francofr@tiscali.it for pointing the bug)

 2) When I open any of the PHP files in my browser, the browser window stays
    blank.

Answer:

    Most likely you have your display_errors variable set to Off in your php.ini
    file, your virtual host configuration, or a .htaccess file. Probably there
    was an error related to gettext or mbstring not being active in your PHP
    interpreter.
    
