Apple has released Mac OS X 10.7.1 (Lion) for both clients and servers, and as usual, it comes with improvements in stability and compatibility and is recommended by Apple.
Mac OS X 10.7.1 Changes
* Address an issue that may cause the system to become unresponsive when playing a video in Safari
* Resolve an issue that may cause system audio to stop working when using HDMI or optical audio out
* Improve the reliability of Wi-Fi connections
* Resolve an issue that prevents transfer of your data, settings, and compatible applications to a new Mac running OS X Lion
* Resolve an issue where MacBook Air may boot up when MagSafe Adapter is attached
* Resolve an issue causing intermittent display flickering on MacBook Air
* Resolve an issue that causes the SD card slot in Mac mini to run at reduced speed with SD and SDHC media
It’s not that big of an update, but there are some crucial fixes for people.
Check your Software Updates for 10.7.1, but if you need to download it manually, here’s the Apple support link