An update to Android 2.3.4 “Gingerbread” is now available for the AT&T Motorola Atrix 4G smartphone.  The update is marked v4.5.91. 

The update brings the latest version of the Android OS, along with various enhancements and fixes. 

To update, you must be connected to a Wi-Fi hotspot or network.  You may receive a notification that the update is available; if you do not, you can navigate to Settings > About Phone > System Updates to manually install the update. 

For more information including detailed release notes, visit this support page on the Motorola web site.