I create a file in a share. I create a file with the same name on a desktop. When I try to copy file from desktop to a share, I get: Cannot copy file: cannot create a file when that file already exists. It works from Windows XP.
It is fixed in http://us4.samba.org/samba/history/samba-3.0.25c.html : * Fix file overwrites from Windows 9x clients.