I have a Z10 STL-100-2. I didn't get the update 10.3.1 in automatic updates so installed it with Sachesi
Now if anyone remembers we had an issue with the device being completely wiped after a reboot with the leaked OS
It's still there!!!
Whenever I reboot I get the Blue LED and phone restores to state when it was updated i.e.20 th Feb
If you could read post#9 on pg.1 there are instructions from a Blackberry staff member on how to send them your information to help them investigate this properly.