WordPress MU upgrade DB line 250

I finished upgrading a server of 300 wordpress sites from MU 2.8 to WordPress 3.5 Network. It already had the Shardb plugin set-up so the server construction and everything went smoothly.

I had one snag with the db.php file.

I kept on receiving some object error regarding line 250 throughout my sites. It seemed to popup in places that it was trying to grab from the database.

I commented out the problem line and everything is working smoothly (While I do expect something to go bad because of my hack soon)

Here’s the code I commented out

line 250:
/*if ( $k = array_search($dbhname, $this->open_connections) ) {
unset($this->open_connections[$k]);
$this->open_connections[] = $dbhname;
}

http://wordpress.org/extend/plugins/shardb/