on running the Update Manager, following message shows up
E: Encountered a section with no package
E: Problem with MergeList/var/lib/apt/lists/oem.archive.canonical.com_updates_dists_precise-oem-sp1_public_i18n_Translation-en
The package list could not be opened or parsed.
Installed packages have unmet dependencies.
Software center also crashes as soon as it starts.