Now, for the strangest thing ever...
Yesterday, while I was reading, the device made an auto reset. After which I kept on reading as usual.
Today I've turned on my Cybook and my Library was empty. There were only the image files. I thought it was a problem with the SD card detection (I have all my ebooks in the SD card) but the SD icon was in the screen.
I came home and tried to figure out what had happened. Connected the Cybook to my PC and... when browsing the SD Card... all my ebooks where in the music folder.


It wasn't me!! The device did it all by itself. Go figure...