The Amazon Appstore has been updated today, and just like many app updates recently, the main fix is an Android 4.2 compatibility issue. Before the update, if you switched user accounts in Android, it would ask you to log into the Appstore again. This update fixes the issue along with a battery drain issue that’s been plaguing some people.
One thing you’ll notice is that the UI has been updated. It looks a lot closed to the Kindle Fire UI now, just a bit sleeker. While not a major update, it’s a good one for those who use the Appstore.