I was very surprised when I received an "not enough memory" error trying to transfer a Mobi book from my PC to my 8830.

In Options->Status I have a "File Free" of 15945826 I read that as greater than 15MB of free memory, and the book is about 4MB, based on the MobiPocket reader properties. Anyone have any idea why this could be happening. I don't have any email, video, pictures, or any other files stores on this device.