by Quade » Sun Jul 15, 2012 2:34 pm
No way for me to know. Newsbin checks the files on disk when it populates the files list. If they're not there any more, it removes them from the files list. If you moved/rename files during the cleanup process, this might do it.
It might also happen if it can't save the list on exit. Running out of disk space is always bad so, there's no telling what bad things could happen.