After a Update/upgrade do you still get this error?
Similar but not exact problem here.
http://ubuntuforums.org/showthread.php?t=1256554
See also this Bug for possible dupes.
https://bugs.launchpad.net/ubuntu/+source/tzdata/+bug/446370
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package tzdata 2009n-0ubuntu0.9.04 failed to install/upgr
** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/33192343/Dependencies.txt
** Attachment added: "DpkgTerminalLog.txt"
http://launchpadlibrarian.net/33192344/DpkgTerminalLog.txt
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package tzdata 2009n-0ubuntu0.9.04 failed to install/upgrade: subprocess
post-installat
*** This bug is a duplicate of bug 377211 ***
https://bugs.launchpad.net/bugs/377211
** This bug has been marked a duplicate of bug 377211
config.dat is locked by another process: Resource temporarily unavailable
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package tzdata 2009n-0ubuntu0.9.04 failed to install/upgrade: subprocess
*** This bug is a duplicate of bug 349469 ***
https://bugs.launchpad.net/bugs/349469
** This bug is no longer a duplicate of bug 377211
config.dat is locked by another process: Resource temporarily unavailable
** This bug has been marked a duplicate of bug 349469
debconf: DbDriver "confi
