Hi there, this seems similar to some of the other update issues but I cannot seem to get any of the other fixes to work - when I run update it returnes this error message, then the second.
W: GPG error: http://archive.ubuntu.com
quantal Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <firstname.lastname@example.org>
E: Encountered a section with no Package: header
E: Problem with MergeList /var/lib/apt/lists/packages.medibuntu.org_dists_quantal_free_i18n_Translation-en
E: The package lists or status file could not be parsed or opened.
E: _cache->open() failed, please report.
Also I cannot now access software manager, software sources or package manager - they ask for my password then fail to load.
any help would be appreciated
Mint 14 KDE 64bit