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I wish it fixed the bootloader. Three of us (all rooted) were unable to get into recovery after upgrading to 4.1.2. CBers, Jpcalhoun, and I all couldn't get into recovery with 4.1.2.
Are you able to enter recovery through the bootloader while plugged into USB?
Your build includes the binary update. This added updates drivers for the touch sensitivity, Wi-Fi radio, Bluetooth, GPS, orientation sensor, graphics GPU, CPU, and DRM. This binary update solved many bugs, however, build JRo03S is still android version 4.1.1. Build JZo05k is android version 4.1.2. The change in the version number signifies a change in the UI (user interface). This is apparent in the new feature of landscape rotation at the homescreen and app drawer. The new version update also includes all the bug fixes, including the bootloader.
I know that the update did in fact include a change to the notification expand. I believe that it was altered to use one finger instead of two somehow.
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