sbackup creating empty backups

I´m running sbackup in ¨Administrator¨ mode and creating a new default profile that contains a single directory, which is also a samba share. When I trigger a full backup (both from gui and command line), the resulting backup directory contains an empty tar file.

This is in Ubuntu 11.10 (64-bit) with sbackup 0.11.4. Relevant portion of log file is below - any suggestions on why this is happening?

2012-01-15 13:04:07,624 - INFO: Log output for [Default Profile] is directed to file '/var/log/sbackup/sbackup.2012-01-15_13.04.07.623206.log'.
2012-01-15 13:04:07,624 - INFO: Profile settings are being read from file '/etc/sbackup.conf'.
2012-01-15 13:04:07,629 - INFO: Preparation of backup process
2012-01-15 13:04:07,629 - INFO: Initializing GIO File Access Manager.
2012-01-15 13:04:07,638 - INFO: Backup destination: /media/NAS_Backup/Big-Rig_failsafe
2012-01-15 13:04:07,639 - INFO: Perform tests at specified location
2012-01-15 13:04:07,649 - INFO: Checking for snapshots stored in old formats
2012-01-15 13:04:07,659 - INFO: Snapshot '2012-01-15_13.04.07.658893.legion.ful' is being made.
2012-01-15 13:04:07,659 - INFO: Setting packages File.
2012-01-15 13:04:07,699 - INFO: Setting Excludes File.
2012-01-15 13:04:07,700 - INFO: Setting compression format to `none`
2012-01-15 13:04:07,700 - INFO: Option 'Follow symbolic links' is disabled.
2012-01-15 13:04:07,700 - INFO: Inspect file system and collect file infos
2012-01-15 13:04:11,336 - INFO: Summary of backup
2012-01-15 13:04:11,336 - INFO: Number of directories: 14080.
2012-01-15 13:04:11,336 - INFO: Total number of files: 49095.
2012-01-15 13:04:11,337 - INFO: Number of symlinks: 0.
2012-01-15 13:04:11,337 - INFO: Number of files included in snapshot: 49095.
2012-01-15 13:04:11,337 - INFO: Number of new files (also included): 0.
2012-01-15 13:04:11,337 - INFO: Number of files skipped in incremental snapshot: 0.
2012-01-15 13:04:11,338 - INFO: Number of items forced to be excluded: 0.
2012-01-15 13:04:11,338 - INFO: Number of items to be excluded by config: 227.
2012-01-15 13:04:11,338 - INFO: Maximum free size required is '215826 MiB 530 KiB 624'.
2012-01-15 13:04:11,338 - INFO: Available disk size is '891005 MiB 884 KiB'.
2012-01-15 13:04:11,339 - INFO: Snapshot is being committed
2012-01-15 13:04:11,350 - INFO: Launching TAR to make a full backup.
2012-01-15 13:04:11,362 - INFO: TAR returned a message: Total bytes written: 10240 (10KiB, 65MiB/s)
2012-01-15 13:04:11,363 - INFO: TAR has been finished successfully.
2012-01-15 13:04:11,367 - INFO: Simple purge - remove freestanding snapshots older than 30 days.
2012-01-15 13:04:11,369 - INFO: Backup process finished.
2012-01-15 13:04:11,378 - INFO: Terminating GIO File Access Manager.
2012-01-15 13:04:11,379 - INFO: Processing of profile successfully finished (no errors)