modtime out of sync with network drive

[Dave <dave@remove-spam-stringlake.demon.co.uk>]

Hello,

I am using emacs 22.2.1 on ubuntu 9.04. I have a network drive attached
(Buffalo linkstation pro duo - I think it's a samba share) and I have
the drive mounted automatically as a cifs filesystem. This works fine
for everything I do in ubuntu - permissions, running commands, copying etc.

The only problem I have is that when I'm editing a file on the drive in
emacs, everytime I save the file the buffer recorded modtime and file
attribute modtime get out of sync. This means the next mod I make to the
buffer I get the 'file has changed on disc etc' message. This is a real
hassle.

As an example, immediately after a recent save, the modtime as given by
visited-file-modtime was 9454, but by file-attribute was 9438. These are
both different to the value before the save which was 9407 for both.

Any help gratefully appreciated.

thanks
Dave