Update Manager or Software Center crashing

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http://askubuntu.com – Whenever I open Update Manager, the following message is displayed: Could not initialize the package information An unresolvable problem occurred while initializing the package information. Please report this bug against the 'update-manager' package and include the following error message: E:Encountered a section with no Package: header E:Problem with MergeList /var/lib/apt/lists/archive.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages E:The package lists or status file could not be parsed or opened. When I try to open Software Center, it opens initially but then immediately crashe (HowTos)