I use backup feature of OneNote 2007 to store a backup version on a network share Y: that is mapped to \\.psf\DATA. Backup does not work anymore and when I look to Windows events, I see a lot of error prl_fs 50 related to the backup process. I recently upgraded to the latest version of Parallels (5.0.9308) and I am almost sure the issue has started with this upgrade. Regards.