Already, in the week or so since its release, Android 4.2 has been feverishly worked into fresh custom ROMs, each boasting one or two transmuted or otherwise indispensable features to go along with the stock experience. Most notably, CyanogenMOD developers have begun forging the new OS into CM10.1, which is available in pre-nightly forms for Nexus 4, Galaxy Nexus and a few others. So too has AOKP, the more tweak-happy ROM built on AOSP, seen its first builds. Neither ROM is fully-featured, looking and feeling more like the stock Android experience than even CM10, which is based on Android 4.1.2.
And since today marks the first update to Android since the release of Jelly Bean MR1, so too must that code be added to the Android Open Source Project. While this maintenance release on a maintenance release is nothing more than a few lines of code — December in the People app, mainly — it also reportedly fixes some instability and bugs on the Nexus 7 and Nexus 10. This is welcome, as both tablets have been less than kind to me over the past week or so.
The code, JOP40D, is being added to AOSP as we speak and will be released in the form of factory images for various Nexus devices in the coming days.
Source: Google Groups