Hm... I've got the same problem here on my PW3 here.
Yesterday I made a post about it
here and blamed it on RP/CRP, but now that you've said it, I wonder if it was not because of KUAL.
No way to check though, it's dead anyways lol...
EDIT:
Thinking back, mine didn't brick because of KUAL, I had just done a factory reset and installed RP/CRP accidentally after that, no KUAL involved.