Apple has issued an update including "general fixes, compatibility updates, and security improvements for the AirPort Extreme Base Station with 802.11n." The update will require Airport Utility 5.1, which was included in AirPort Base Station Update 2007-001.

Apple says the update will fix two security issues with the 802.11n Airport Extreme Base Station. One revolves around improper default IPv6 configurations which may expose network services on local machines to remote attackers, while the other corrects an issue where local users may be able to see the filenames of a password protected AirPort Disk without providing a password.

Update: Arstechnica, as well as some forum members, have found that AirPort Disk speeds have seen modest improvements with the update.