Users have reported that the latest AirPort firmware update (7.4.2) has caused the external hard drives connected to their AirPort Extremes via USB to lose connectivity after only a few minutes of operation.
Some users have reported frustrations regarding the performance of their iPhones on their home wireless networks after the latest firmware update to Apple's wireless AirPort devices, 7.4.2.
Purchased tracks not playing properly.
Cryptic release notes as usual.
iTunes 7.4.2 released: addresses ringtone issue, other bugs
Playback issues may be plug-in related.
The unwelcome sync.
iTunes 7.4.2 breaks most third-party ringtones, causes problems with Apple's own
iPhone sync problems continue under iTunes 7.4.2: device not recognized, data doesn't transfer
You must have iTunes 7.4.x to receive the iPhone Software/Firmware 1.1.1 update