Comment 17 for bug 990388

Comment #5 works also for me with both server and client running Ubuntu 12.04. Without that directive it seems there's some privileges problems with the nobody user (the default bad-user mapping)

Excerpt from server's smb.conf:

[global]
   map to guest = bad user
########## Printing ##########
   load printers = yes
   printing = cups
   printcap name = cups
   use client driver = yes

[printers]
   comment = All Printers
   browseable = no
   path = /var/spool/samba
   printable = yes
   public = yes
   guest ok = yes
   read only = yes
   create mask = 0700