anti-splog 1.0.6.1 includes

Elite
    • 533 points
    Like some sort of WPMU DEV God"
    Exceptionally helpful
    Shawn

    Member  —  2nd March 2011         

    blog-suspended.php, lines 37 and 129:
    require_once('mu-plugins/anti-splog/recaptchalib.php');

    Since anti-splog 1.0.6.1 is only valid in WP 3.1+, which requires a "plugins" install, these lines should each read:
    require_once('plugins/anti-splog/includes/recaptchalib.php');