Apple has released AirPort Client Update 2010-001 also known as AirPort Utility 5.5.1.
The update includes “general bug fixes and addresses the following issues:
* Not importing all settings when importing a configuration.
* Not propagating MAC address control lists when using an extended network. “
Apple also released a firmware update for Airport Extreme Base Station and Time Capsule which were released late 2009. The update is Time Capsule and AirPort Extreme Base Station Firmware Update 7.5.1 and includes the following fixes:
* An issue with wireless performance in the 5GHz band
* An issue with creating a Guest Network in the 5GHz band
Arabic version of this post on SaudiMac.net.