And I could reproduce the error!
I removed books (2) from the device through the pc, and yes seemingly this needs a total reshuffling of the database... so back again I am on the splash screen...
I am now patiently waiting for the device to overcome this violent act of file deletion....
I just can't imagine one would have to go through deleting books one buy one using the 903 gui. So, upon recovery I will re-install the firmware and be very prudent in moving to and fro books.
Is this normal? Do you have the same thing happening?