From http://ubuntuforums.org/showthread.php?p=4884372#post4884372:
The Sharing options still don't work, but I did manage to share
folders properly through shares-admin (Alt+F2 - 'shares-admin' - run).
I ended up adding 'shares-admin' to the System-Administration menu.
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[Hardy] Can't
I found this post: http://www.linuxforums.org/forum/ubuntu-help/118877
-samba-hardy.html - and when I did what they did and replaced my
smb.conf with a skeleton one it did work properly, which suggests that
there is an error in the way that Ubuntu handles the Samba conf file.
Just to clarigy, I