The 7.3.1 release also applies to Time Capsule, giving you the ability to "archive" your Time Machine backup to an external disk connected to the USB port.

After spending eternity on hold, the Apple tech told me that they're going crazy with calls since the 7.3.1 update. The problem was that I could no longer connect wirelessly to the airport after the update. The solution was to perform a factory reset of the router and start over (stick a paper clip into the small hole on the back of router until amber light on front starts to blink - then connect via the utility and set it back up).

Hi,

I'm onto my second Airport Express in 2 weeks. Last week I spent an hour on the phone to tech support and they had no suggestions. Eventually they decided the unit was faulty and issued a replacement.

After waiting a week the new unit arrived, plugged in, set up and worked flawlessly.

Then I applied firmware 7.3.1 and the problems started again.

Rolling back the firmware fixed the connection issue.

To roll back the firmware to 7.3:

1. Connect to the Airport Express via an ethernet cable
2. From the menu choose Base Station -> Upload Firmware
3. Select version 7.3 from the Upload Version drop down list
4. Click OK

Once the Airport Express restarts you should be able to detect it wirelessly.

Do not apply 7.3.1 again until this issue is rectified.

Cheers,
Nick