PHP errors with multi-db activated

I installed the plugin last night and everything seems to be fine and working on the frong end.

However, I'm seeing a large number of PHP errors in relation to this plugin. Three in particular. Do I need to be concerned about these?

Use of undefined constant DATACENTER - assumed 'DATACENTER' in /home/cws/public_html/wp-content/db.php on line 287
PHP Notice: Use of undefined constant DATACENTER - assumed 'DATACENTER' in /home/cws/public_html/wp-content/db.php on line 294
PHP Notice: Undefined index: lhost in /home/cws/public_html/wp-content/db.php on line 333

Also while running the move blogs script I had several hundred errors, all the same:
PHP Warning: mysql_free_result() expects parameter 1 to be resource, string given in /home/cws/public_html/wp-content/scripts/move-blogs.php on line 140
PHP Warning: mysql_free_result() expects parameter 1 to be resource, string given in /home/cws/public_html/wp-content/scripts/move-blogs.php on line 141