select(database) fails in 3.0RC3

The following php code (in page.php, for example) fails in 3.0RC3, but works in 2.9.2:

global $wpdb;
$wpdb->show_errors = true;
$wpdb->select("ebrt_ebc");

Warning: Missing argument 2 for wpdb::select(), called in /home/ebrt/public_html/wp30rc3/wp-content/themes/default2/page.php on line 20 and defined in /home/ebrt/public_html/wp30rc3/wp-includes/wp-db.php on line 738

Can’t select database

Reported here: http://core.trac.wordpress.org/ticket/13914