I once in a while get this message in my rsnapshot log, and an identical message in `/var/log/messages`. Unfortunately, there is no other deviation from normal output, despite `loglevel 5` in `/etc/rsnapshot.conf`, besides a summary warning at the end:

```
[24/Feb/2014:11:00:02] /usr/bin/rsnapshot daily: started
[24/Feb/2014:11:00:02] Setting locale to POSIX "C"
[24/Feb/2014:11:00:02] echo 9045 > /.../temp/rsnapshot.pid
[24/Feb/2014:11:00:02] /bin/rm -rf /mnt/backup/.snapshots/daily.5/
[24/Feb/2014:11:00:48] mv /mnt/backup/.snapshots/daily.4/ /mnt/backup/.snapshots/daily.5/
[24/Feb/2014:11:00:48] mv /mnt/backup/.snapshots/daily.3/ /mnt/backup/.snapshots/daily.4/
[24/Feb/2014:11:00:48] mv /mnt/backup/.snapshots/daily.2/ /mnt/backup/.snapshots/daily.3/
[24/Feb/2014:11:00:48] mv /mnt/backup/.snapshots/daily.1/ /mnt/backup/.snapshots/daily.2/
[24/Feb/2014:11:00:48] mv /mnt/backup/.snapshots/daily.0/ /mnt/backup/.snapshots/daily.1/
[24/Feb/2014:11:00:48] mkdir -m 0755 -p /mnt/backup/.snapshots/daily.0/
[24/Feb/2014:11:00:48] /usr/bin/rsync -a --delete --numeric-ids --relative --delete-excluded --exclude={/dev/*,/proc/*,/sys/*,/tmp/*,/run/*,/mnt/*,/media/*,/lost+found,/home/srv/recycle/*} --exclude=mnt/backup/.snapshots --link-dest=/mnt/backup/.snapshots/daily.1/.../ /. /mnt/backup/.snapshots/daily.0/.../
[24/Feb/2014:11:02:13] Some files and/or directories in / vanished during rsync operation
[24/Feb/2014:11:02:13] touch /mnt/backup/.snapshots/daily.0/
[24/Feb/2014:11:02:13] No directory to delete: /mnt/backup/.snapshots/_delete.9045
[24/Feb/2014:11:02:13] rm -f /home/kev/scheduled/temp/rsnapshot.pid
[24/Feb/2014:11:02:13] WARNING: /usr/bin/rsnapshot daily: completed, but with some warnings

```

What could it be? Why doesn't it report which files vanished even though I have it on the highest loglevel? (Or do I not even have the loglevel setting right? Because this doesn't seem very verbose.)