JB Update - No Going Back?
Google is delivering an update to the Nexus 7 which a minor upgrade with one major features change.
The update to Jelly Bean 4.1.2 for the Nexus 7 users set the homepage to landscape mode and makes it run smoother and faster. Once you update your Nexus 7 you will not be able to run Jelly Bean 4.1 again. The build number is JZO54K, and the tag is android-4.1.2_r1.
Jelly Bean 4.1.2 also fixes some bugs. To check for the update go to Settings > About device > Software updates and tap to ch for updates.
Update 10/15/2012: The Galaxy Nexus and Nexus S are starting to get the update to Android 4.1.2 over the air.