The casper package is a component of the livefs, and is not meant to be installed on an installed system. The casper initramfs hook has been fixed in the version of the package in 12.04, but at the time this error occurred you still had the 10.04 version of casper installed.
The casper package is a component of the livefs, and is not meant to be installed on an installed system. The casper initramfs hook has been fixed in the version of the package in 12.04, but at the time this error occurred you still had the 10.04 version of casper installed.