A clean install of Dec 21 doesn't boot? :/
I've only done the update from Dec 08 to Dec 21, but did not try a fresh install. If I have some time tonight, I'll give it a try to confirm.
By chance did you happen to try it with the very latest SuperSU 2.65?
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First tried Dec 08 to Dec 21 dirty flash with SSU 2.64 and 2.61 separately, it doesn't work. Then tried clean flash with SSU 2.52, it doesn't work too. Never tried with 2.65.
Actually it's not a big deal. I'm really happy with Dec 08 build. I don't want to waste your time for this
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