Apple has released firmware updates for AirPort Extreme and AirPort Time Capsule base stations with 802.11ac Wi-Fi (the tower-like models receive Firmware Update 7.7.7), as well as older AirPort Express, AirPort Extreme, and AirPort Time Capsule models with 802.11n Wi-Fi (Firmware Update 7.6.7). Both updates fix a bug that could prevent communication between clients on the same network, improve performance with an extended guest network, and sort out potential naming conflicts with Bonjour Sleep Proxy. You must update your AirPort base station using AirPort Utility on your Mac or an iOS device with the free AirPort Utility app installed (the download isn’t available via the Apple Support Web page or Software Update). A few people are reporting problems with these updates, although it’s hard to know how widespread they are. There’s probably no harm in passing on these updates if you’re not experiencing any problems with your network now. If you do decide to update, make sure it’s when some downtime wouldn’t be catastrophic.