I found this in the archives:
http://samba.cadcamlab.org/lists/samba/Feb2002/00318.html
It pertains pretty directly to the problem I'm seeing.
I first started having it with my 2.7 installed version
so I upgraded to 2.8. I'm still having the same problem.
Basically, I have a group of web developers that use
the linux/samba server for editing files for the site.
All the files are "owned" by root. The groups vary
based on the developers with access, and the files have
664 permissions. (Directories have 2664
[www]
path = /path/to/www
public = yes
writable = yes
write list = @developers
force create mode = 0664
force directory mode = 2775
printable = no
Everything was working great until a few days ago
(while I was on vacation - of course) one of them
discovered that they couldn't overwrite files in
a particular subfolder. I've been racking my brains
trying to figure it out. Nothing shows up in the
logs, and if I go up a folder everything works fine.
All the folder perms are good, and the file perms
are good. And the perms of our local copies aren't
actually denying it, and the files are not in use.
If I copy the files using the same user(s) via ssh
everything works just dandy. Has the same bug
cropped up again or is this something different?