After logging in I wanted to check the setting of my tablet. I pulled down the notification bar and ... realized that the Settings button is gone. I remembered that I read something about the new "Quicksetting" Feature. You must wipe with
I took a quick look through the available settings and checked out the new "Daydream" which you find in the Display Options.
The "Developer options" in the settings are not visible by default. To enable them, you need to go to "About Tablet" in the settings, scroll down to the "Build number" and tap it seven times, yes I know that sounds crazy. When you go back, you will see an entry for the "Developer options".
Next thing I checked out was the new Android Keyboard. I am not sure about this. Wiping to write is really fast - but only if the Keyboard recognizes the words you are trying to write correctly, which it didn't in my case. I couldn't get it to write the same letter twice in one word, so I switched back to the SwiftKey Keyboard.
I will give the Android Keyboard another try when I have a bit more time.
After the update my Amazon apps (Appstore, Amazon Kindle, Amazon MP3) couldn't remember my Amazon credentials any more.
Another thing I realized was that my custom wallpaper doesn't seem to fit the screen any more. When I scroll to the most left or right Home screen there is a 1 cm gap without wallpaper. Looks like they changed the resolution for the wallpaper.
Oh, and Firefox crashes a lot under Jelly Bean 4.2 :-(