MS-office tmp files are remaining on CIFS shares if e.g. excel is closed

After update our S7120 to the latest FW 2013.06.05.3.0,1-1.14 version, we have an issue with temporary files of Microsoft Office applications.

This means if an excel files (xls or xlsx) is opened by a user an temporary file of about same size is created in the same directory and after closing excel the file remains on the CIFS share of the S7120. This is really annoying for the users and btw a waste of diskspace with have to manually clear.

We use Windows 7 with Office 2010 with latest patches of OS and Office applied.

Does somebody see same or similar behavior with the FW version mentioned above. The release notes of the FW notice some changes in the SMB protokoll. There seems to be some incompatibilities with original Windows SMB.