Apple has released
AirPort Extreme Firmware Update 5.0.3, an upgrade for the AirPort Extreme Base Station.
This firmware update — which is not for use with the original (Graphite) or the dual-Ethernet (Snow) base stations — fixes an issue where an AirPort Extreme network appears to be unavailable as displayed by the AirPort Menu Extra or the Internet Connection application.
According to Apple, this behavior may result from excessive 2.4GHz radio interference that causes the wireless network to disappear. Also, the AirPort Extreme Base Station will no longer spontaneously restart itself, and there’s now no known limit to the number of FTP connections that can be initiated through the base station.
System requirements are an AirPort Extreme Base Station, AirPort Software 3.0 or greater, and Mac OS X 10.1.5 or higher (with the Networking Update). The firmware update is a 1MB download.