Appleshare and Samba see different directory contents

Create a file on a Mac ( OS X 10.3.9 )
Copy the file onto a Windows 2003 server ( fully patched ). The file dissappears from the appleshared directory.
Look for the file via Samba from another Mac ( 10.4.10 ) or from a PC - the file is present.
Copy another file from the same 10.3.9 Mac, a few seconds later, that file appears OK.
Copy the same file over again. The file stays hidden.
Rename the file via Samba ( even just change 1 character from lower to upper case ) and the file appears in the appleshare.
This is a wierd intermittent fault.
Nothing relevant appears in the servers event logs.
Experiment:
Take the file which hides. Copy it on the original Mac to a new name. Then copy the new file onto the appleshare. The file appears as expected.
:crazy:
Anyone got an idea why the files occasionally dissappear or a robust way of getting them back?

A couple of thoughts...

I wonder if this is an OS X 10.3.9 issue? The GUI is interpreting the copy as a movre. Does refreshing the Appleshare directory bring the file back? Does refreshing that directory a little later when the SAMBA server rebroadcasts its presence reveal the file?

(Reading from the post, files copied from 10.4.120 Mac OS X behave as expected?)

Similar behaviour has been reported by others using 10.3, where it was suggested that this was related to incorrect locking of the resource-forks. Try zipping a file before copying it over and see if that disappears as well.