Brand new PW4, JB went well, MRPI and KOReader was installed, update blocker directory was created. I thought it is time to update the FW from 5.10.0.2 to 5.11.1.
Reinstalled hotfix just to be on the safe side, then upgraded to 5.11.1 , installed MRPI and KUAL again, also KOReader and registered the device at amazon, first time using its WiFi.
Kindle has downloaded an update!
After I answered LATER, some minutes later it did update itself, automatically.
I checked, the update blocker directory was intact, KUAL, KOReader, etc are working. How could it update anything?