I set the smb.conf as
 max protocol = SMB2;

In this case, the I can't move the file whose filename 
first character is period (for example, '.hoge.txt') on
the samba mounted directory to its subdirectory.
Using usual explorer on Windows Vista.

(I know that in the Windows, such files (like '.hoge.txt')
can not be created by using explorer. However, there are 
ways to create such files.)

For example, the samba mounted directory is \\sambaserver.
Then I can't move
 \\sambaserver\directory1\.hoge.txt
 to
 \\sambaserver\directory1\subdirecotry2\.hoge.txt
.

In other case, (for example, move to local directory or use SMB1, 
etc.) I can do such.

I think x64 or Vista is not the reason.

K. Naito