error in apache error log

[NickFox]

I see a couple of these errors in my apache error log. I just upgraded to version 3.2.2. Not sure if this is an important issue but wanted to bring it to your attention.

[Thu Dec 30 06:02:44 2010] [error] [client 150.70.75.30] PHP Fatal error: Call to undefined function ws_plugin__s2member_user_access_role() in /var/www/mywebsite.com/public_html/wp-content/plugins/s2member/includes/functions/login-redirection.inc.php on line 68