[Samba] iPDF cluttering up file system

[jjrowan]

I have a customer using OS/X that creates thousands of PDFs per month 
using a tool called iPDF ART5.
The server is Centos 5.x with samba-3.0.33-3.29.el5_5.

Every PDF he creates also creates a hidden file with similar name.

These files get rsync'd onto my server and my tape robot attempts to 
save them to tape but generates file not found errors.

._Skin Care : Cannot stat: No such file or directory


I ran strings against one of these files and the contents are below.  Is 
there a way I can configure Samba to prevent creating these hidden files?

Mac OS X
iPDF ART5
ATTR
15!Saved As v.15 Created by v.15.0.0
vers
Version