This release fixes a security vulnerability, all users of cvs.module (4.7.x-1.0 or 4.7.0 from before the new release system) are urged to upgrade. For more details, see DRUPAL-SA-2006-028.
This release includes a new database update: cvs_update_5() which removes a stale entry from the {variable} table. After you upgrade, you should run update.php for your site.