There were several situations where a file got decrypted during copy or move, even if persistent encryption was active. This issue has now been solved with the version SafeGuard LAN Crypt client 3.71.
Known to apply to the following Sophos product(s) and version(s)
SafeGuard LAN Crypt Client 3.71
Windows XP Professional SP2/SP3 32bit
Windows Vista (Ultimate / Enterprise / Business) SP1/SP2 32bit
Windows 7 (Ultimate / Enterprise / Professional) 32bit
What To Do
Please install SafeGuard LAN Crypt client 3.71 to solve above issue.