OS X 10.7.3 also fixes bugs related to using smart cards to log in, issues authenticating with directory services, and compatibility issues with Windows file sharing. Also included: fixes for an issue printing certain Microsoft Word documents, a graphics performance problem after certain iMacs wake from sleep, and a Wi-Fi connection issue after waking from sleep. There are also a slew of improvements for Directory Services.
Apple offers the 10.7.3 update through Software Update. You can also download the updater directly from Apple’s website, whether you need the client version or the only slightly larger combo updater.