Apple has issued a firmware update for all Apple 802.11n Wi-Fi base stations including AirPort Express, AirPort Extreme, and AirPort Time Capsule. The update is 7.6.4 and 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
To install firmware updates on your Airport base station, follow the directions available here.
You will need to have the latest version of Apple’s Airport Utility that is located in Applications > Utilities folder.