Hi. I fell in to the same hole as others here. My mum dug out her N647 recently and I connected the wifi out of curiosity. I got the bad update. Books are there, but the kobo can't see them. Also, wifi only connects to WPA2 and throws an internet error if you try and use the shop. Just thought I'd add that in case anyone still cares
davidfor, do you mind sending me the link to the known good firmware? It would be very much appreciated. Thanking you in advance.