Apple has posted an update to its Airport Extreme software labeled "2007-002".
About AirPort Extreme Update 2007-002
This update is recommended for all Intel-based Macintosh computers and improves compatibility with AirPort Extreme base stations and networks.
This update includes the content from the AirPort Extreme Update 2007-001, and addresses a security issue as described in: http://www.info.apple.com/kbnum/n305031 [1]
This update also improves compatibility for the MacBook Core 2 Duo and the MacBook Pro Core 2 Duo when using certain third-party access points configured to use WEP Open System security.
Learn more about AirPort Extreme [2].
The update weights 6.5MB and is available either from the Software Update utility or from Apple's support [3] web site.