W:GPG error: http://archive.canonical.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>, W:GPG error: http://de.archive.ubuntu.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>, W:GPG error: http://de.archive.ubuntu.com oneiric-backports Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>, W:Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/main/i18n/Index  No Hash entry in Release file /var/lib/apt/lists/partial/de.archive.ubuntu.com_ubuntu_dists_oneiric_main_i18n_Index
, W:Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/multiverse/i18n/Index  No Hash entry in Release file /var/lib/apt/lists/partial/de.archive.ubuntu.com_ubuntu_dists_oneiric_multiverse_i18n_Index
, W:Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/restricted/i18n/Index  No Hash entry in Release file /var/lib/apt/lists/partial/de.archive.ubuntu.com_ubuntu_dists_oneiric_restricted_i18n_Index
, W:Failed to fetch http://de.archive.ubuntu.com/ubuntu/dists/oneiric/universe/i18n/Index  No Hash entry in Release file /var/lib/apt/lists/partial/de.archive.ubuntu.com_ubuntu_dists_oneiric_universe_i18n_Index
, W:Failed to fetch gzip:/var/lib/apt/lists/partial/de.archive.ubuntu.com_ubuntu_dists_oneiric_universe_binary-i386_Packages  Encountered a section with no Package: header
, E:Some index files failed to download. They have been ignored, or old ones used instead.