I flashed an older version of the rom, then dirty flashed to the new nightly. It booted this time. Before, I had tried to clean wipe and then flash to the new nightly from the stock rooted Verizon 4.4.4, and even with a wipe, that caused it to be permanently on the boot animation. Not sure why.If it's available, might want to compare md5sum. If not, give it a try with a fresh wipe. I've been dirty flashing since 12/10 with no issues. Not my daily driver yet, but I restore my cm12 backup then flash the latest to test. When I'm done I make a fresh backup, then restore Stock. After I'm booted back into stock, I remove old backups, keeping only the most recent cm12 and stock.