Sorry to bother again..
Wiki states:
"There is a single, complex, special case for 5.8.9.0.1 firmware version. If you get a Kindle with that firmware version, please just post in this thread before you do anything to it, your device **might** be one of the rare exceptions."
Just curious (and a bit paranoic

), what are causes/peculiarities that caused bricked devices for 5.8.9.0.1?
I'm not 100% sure of characteristics I reported (the device is second-hand).
I'd like to minimize risks...