Files on a home computer that are compressed by using NTFS compression may not be backed up correctly by Windows Home Server On a home computer, you can compress some files by using NTFS compression through advanced attributes settings. In some cases, these files may not be backed up correctly by Windows Home Server.
A fix is available to address this issue. Please read the KB article for more information and the link to the fix for your home computers that have the Windows Home Server Connector software installed