Can you trace this a bit more into cifs? cifs is one of mine and I use it daily without problems, though I never migrated from sam to acme, so perhaps I just don't see your issue.
I remember that smb/cifs does have weird timestamps some of which are only changed on 2 second boundries - though the code you show should cope happily with that. The server has its own timestamp which cifs reads at startup and uses that to convert the server's localtime to utc, but I think this time is read only once per session so that is unlikely to be the problem. Sorry if I'am a bit vague but it was 10 years ago now, but I am happy to dig if you can provide a bit more info. -Steve
