[Argel]

Just when I was coming to rely on Calibre I discover that large chunks of my library have simply gone missing.

The books show up in the library display with title/author metadata present and an apparent size but there are no formats available - not surprising since the directories pointed to are empty.

These are books which have been successfully imported, converted and uploaded again - they were there and they were fine.

Further inspection suggests that basically all books in mobi format which were present in the library before the beginning of December 2009 have gone. Books added since that date appear untouched. There are books in lit format from before that date but I cannot say whether any lit books have gone. Many prc books are still there, too, so no idea whether any have gone. My guess is that it is only mobi.

As far as I am aware I have never touched the Calibre directory structure - I have only ever downloaded and installed new versions and everything has seemed fine.

OS is Vista 32.