Have you any assumption why in log file there is nothing about jailbreak process?
I've disabled wi-fi, but it still freezes and then reboots...
The registration it is my second problem...

Amazon says that it's registered to another account, but in Kindle settings there is no information about it. There is no Deregister button, only Register...
When I'm trying to register over wi-fi it shows me a connection error, but browser is working fine...
I've asked Amazon's support about it, but they didn't respond...
Here's screenshots:
http://flic.kr/s/aHsjzpdUgR