The update addresses a few issues including the Wifi issues we’ve been hearing much about. It also appears to incorporate the recent Migration Assistant update. It is available via Software Update.
The 10.7.1 update is recommended for all users running OS X Lion and includes general operating system fixes that enhance the stability and compatibility of your Mac, including fixes that:
– 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
For detailed information on this update, please visit this website:http://support.apple.com/kb/HT4764.