At least I've burn a cd-rw.
Everythins has been OK, until the moment of flashing the main partition. The green bar after 2 or 3 seconds turns to red telling: "failed" (I've been waiting for fifteen minutes without success).
I've tried 2 more times with the same result: "failed" when is on the screen: "we are now flashing the main partition. This will probably take between 3 and 10 minutes"
The kindle remains in Diagnostic Mode. I've tried pushing the power button for 20 seconds, choosing "reboot system" in the diagnose menu.
I must say that my KT has the 5.3.2 firmware and has never had jailbreak