Oh [edited - M.] - after loading the update_combined-dev-certs-20121002_install.bin and restarting, Kindle says:
-------------- ! -----------------------
The update was not successful.
If you need assistance visit
www.kindle.com/support.
To resume using your Kindle, please press the power button.
UPDATE ERROR: 3
-------------------------------------
What do I do now? Just restart and try it again?
N/M - after installing the rescue pack I tried again, and this time it worked. Thanks!