I turned my phone off last night and when I tried to turn it on this morning I encountered bootloops. I was running 4.4, did multiple wipes coming from 4.3, and it seemed stable. It did reboot whenever I tried to update Advanced Lie Detector, but that's not a big issue.
The weird part is that sometimes it booted fully and showed me a glimpse of the home screen, before rebooting again. I tried switching to the 800 MHz medium voltage kernel (I had low) but to no avail. My last backup is two days ago, but of 4.3, although with 4.5 out soon that may be ok.