However I add books to Marvin 3.0, whether from Dropbox or via ODPS, it adds books with "subjects and tags" and I cannot tell where they're them pulling from. All of my tag fields on Calibre are empty, and whilst I have defined #customshelves, it's completely ignoring those. I find this really frustrating as I have a very large library and I tend to browse it by categories I have predefined and sorted. I could deal with it if it was just ignoring them completely (hopefully which will change when a calibre/Marvin plugin exists again), but where is it finding the stuff it's adding and is there a way I can stop it from doing so? It's really inconsistent and is driving me crazy!