Over the last 24 hours, Apple released several important updates:
AirPort Utility 5.4.2 provides several fixes, including:
An issue causing AirPort Utility to be unable to read certain AirPort wireless device configurations.
An issue causing AirPort Utility to sometimes be unable to discover an AirPort wireless device when Back To My Mac is enabled.
An issue causing AirPort Utility to sometimes be unable to download firmware.
An issue causing AirPort Utility to not correctly import Access Control Lists created in AirPort Admin Utility 4.x
Added the ability in AirPort Utility to show all wireless passwords in the "Equivalent Network Password" sheet.