Originally Posted by taming
I'll check the thread you mentioned and see if any suggestions there that I have not tried as yet.
I've already tried the reformat (in the Kobo and in an external reader) of the SD cards. I also added the books back a couple of times, once en masse and the second time adding 100 at a time with no change in the behaviour. I must admit that the time to process the books after adding them is a lot shorter than it used to be making this playing around a bit more enjoyable.