upgrade.php error for 2.0

hey everyone. ran into a snag upgrading to 2.0.

followed the tamba2 guide to the tee, and was running smoothly until i got to the upgrade.php. i get the following error when running upgrade.

“Fatal error: Call to undefined function: update_user_cache() in /home/joshinja/public_html/wp-settings.php on line 72”

i’m looking in settings.php, and this is what i have…

if ( !update_user_cache() && (!strstr($_SERVER[‘PHP_SELF’], ‘install.php’) && !defined(‘WP_INSTALLING’)) ) {
if ( strstr($_SERVER[‘PHP_SELF’], ‘wp-admin’) )
$link = ‘install.php’;
else
$link = ‘wp-admin/install.php’;
die(sprintf(__(“It doesn’t look like you’ve installed WP yet. Try running install.php.”), $link));
}
$wpdb->show_errors();

i tried using install as well, but got the exact same error. any advice is appreciated! thanks and happy new year!