The first Software Update to OS X Lion, 10.7.1 is now available.
This 10.7.1 update was expected quite quickly after the release of Lion in order that Apple could quickly roll out any urgent bug fixes that would only become apparent once the finished OS was out in the wild. This was also the case with the previous OS X releases 10.6 Snow Leopard and it's older sibling 10.5 Leopard.
According to Apple:
"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"



