No such luck. Error 13 and requires Terminal command to set permissive.
Once set, it works as expected, backup, recovery, etc., so it's moving in the right direction!
Update: I was attempting to install the latest CM12 build from Valera1978 and on opening the Terminal to set permissive, I noticed an error.
Recovery logfile uploaded to
http://pastebin.com/93igkf65 - looks like something weird in CACHE?
Didn't impact wipe or load, but backup failed during MD5 creation for DATA and forced a reboot back into TWRP.
ROM seems to be functioning as expected, so it's more a worry /annoyance, and doesn't seem to be a funtionality impacting glitch.