The log file doesn't contain much information.
Have you tried reinstalling virtualbox-ose as suggested?
** Changed in: virtualbox-ose (Ubuntu)
Status: New => Incomplete
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package virtualbox-ose 2.1.4-dfsg-1ubuntu3 failed to install/upgrade: Package
is in a very bad inconsistent state - you should
https://bugs.launchpad.net/bugs/400435
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