It appears your download was corrupted, clear your cache and try again.
dpkg-deb:
`/var/cache/apt/archives/openoffice.org-common_1%3a3.1.1-5ubuntu1.1_all.deb' is
not a debian format archive
dpkg: error processing
/var/cache/apt/archives/openoffice.org-common_1%3a3.1.1-5ubuntu1.1_all.deb
** Attachment added: AptOrdering.txt
http://launchpadlibrarian.net/39855201/AptOrdering.txt
** Attachment added: Dmesg.txt
http://launchpadlibrarian.net/39855203/Dmesg.txt
** Attachment added: DpkgTerminalLog.txt
http://launchpadlibrarian.net/39855204/DpkgTerminalLog.txt
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package