This update is available for all Apple 802.11n Wi-Fi base stations including AirPort Express, AirPort Extreme, and AirPort Time Capsule. It contains fixes that:

• Resolve an issue that may cause AirPort Time Capsule to report that the backup disk is in use
• Resolve an issue that may cause an IPv6 Tunnel error 
• Resolve an issue that may intermittently cause a loss in Wi-Fi connectivity with iOS devices

 Note: This firmware update is for all 802.11n AirPort base stations.

For information on the security content of this update, please visit:  http://support.apple.com/kb/HT1222

For detailed information on AirPort base station firmware updates, including instructions how to install the update, please visit: http://support.apple.com/kb/HT1218

For more information on using AirPort products, go to the Product Support Page at: http://www.apple.com/support/airport/