Hi, I'm having this problem.. Every time I modify a file from a Windows Machine, UID and GID of the file changes. By example the file foo. before (This ones are what I want to preserve)... foo rwxrw-rw- beforuser beforgroup After modificacion (With Word or Excel by Example or any other software) foo rw-rw-r-x afteruser aftergroup It's mean "foo" changes his user-owner, group-owner and permissions. What I really wants is that files always can preserve his (users and groups) owners. I want files that even when users modify his content doesn't change his attributes or owners. Thank You. http://www.aloportal.com