[DerekM]

Are you using 3.7 or later? If so, the backup is saved as .OOBK in the file wrapper. Files that start with a period are hidden so you won't see it in the Finder. However, I haven't looked at SugarSync yet so that file may likely as well have been lost unfortunately. Have you seen this problem, or used other apps that use file wrappers, with SugarSync?