Late yesterday, Apple released Airport Base Station and Time Capsule Firmware Update 7.6. The update addresses several issues, including issues with AirPlay audio streaming and DNS servers.
Firmware updates for the devices are installed using AirPort Utility 5.5.3 or later by selection “Check for Updates…” from the “Airport Utility” menu. Apple’s release notes for the update are as follows:
This update for all 802.11n AirPort Express, 802.11n AirPort Extreme and Time Capsule models provides fixes for the following:
– An issue with performance on overlapping wireless networks
– An issue with AirPlay audio streaming
– An issue with configuring multiple entries for DNS servers
For detailed information on Firmware Updates 7.6, including how to install the update, please visit:All about Time Capsule, AirPort Extreme, and AirPort Express base station firmware updates
It is recommended that AirPort Utility 5.5.3 or later be installed before updating to Firmware version 7.6.
For information on the security content of this update, please visit: http://support.apple.com/kb/HT1222