Admins rejoice! The latest patch for the BlackBerry Enterprise Server is available for download. The device-side software made it out yesterday, and BIS was upgraded a couple of weeks ago, so the circle of upgrading is all completed. Big changes in this service pack include rich content e-mail, support for Microsoft Office Communications Server 2007 and Lotus Sametime 8.0, and control RIM value-added applications. On top of that, reconciling permanent message deletion has been improved, and there are also some changes to the BlackBerry Configuration Database schema, the naming of collaboration clients, Mobile Data System conventions and related software. As for that PDF vulnerability, this patch should take care of everything A-O-K. Go ahead and download BES 4.1.6 here, or scope out the update notes here.