Status: Fixed
I found the error in the USN handling code.
The problem was that the filename was compared case insensitive, when doing USN file listing.
This caused all my tests to pass (as the folders have the correct case).
I managed to type it with the incorrect case in a test setup and found the error.
I will put up a new preview soon with the fix.
I would recommend that you use that version instead and delete the usn-policy setting from the backup.
git-svn-id: https://duplicati.googlecode.com/svn/trunk@605 59da171f-624f-0410-aa54-27559c288bec