Nothing out of the ordinary happened when reconfiguring.
Here is my old smb.conf
** Attachment added: smb.conf
http://launchpadlibrarian.net/19634151/smb.conf
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package samba-common 2:3.2.3-1ubuntu3 failed to install/upgrade: subprocess
post-installation script returned error exit status
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/18430929/Dependencies.txt
** Attachment added: DpkgTerminalLog.gz
http://launchpadlibrarian.net/18430931/DpkgTerminalLog.gz
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package samba-common 2:3.2.3-1ubuntu3 failed to install/upgrade: subprocess