I've been struggling with upgrading a client's site all day so I'm hoping someone here can help.

I had 5.4.2.2 running smoothly but wanted to upgrade to the latest version to keep things as secure as possible.

I synchronized my local site (running under MAMP) with the live site and after some headaches I finally got it upgraded to 5.6.0.2 and apparently running well. However, after moving the local site to the live site I'm getting this PHP Warning on every front-end page:

" Wrong parameter count for session_set_cookie_params() in /var/www/vhosts/bvumaryland.org/httpdocs/updates/concrete5.6.0.2/concrete/startup/session.php on line 16"

I've tried emptying the C5 cache but that had no effect. I also did some Google searching but all I found were some Drupal bug reports. I've confirmed it appears in every browser, whether logged in or not. It doesn't show up in the C5 dashboard, though.

BTW, my local MAMP is running PHP 5.4 and the live host is a VPS running PHP 5.1.

Any help would be greatly appreciated because I really don't want to revert to an older version! Thanks.