You were right, the culprit was not JB or CM. It was a side-loaded book. When that book is present on the Kindle no books at all show up. When I remove it all the books are shown again.
I tried a mobi-to-mobi conversion, but same thing happened again. I can read it fine on the PC so not sure what is wrong with it.
Is this normal on a Kindle? I would have thought only the corrupt book would be hidden, not every book on it.
Thanks for your help guys. Finally figured it out.
Last edited by Herjar; 01-06-2013 at 10:55 AM.