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: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://extras.ubuntu.com oneiric Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key <ftpmaster@ubuntu.com>

W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG D834D91FA49CCDDB Launchpad PPA for System Load Indicator developers
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG 4DF9B28CA252A784 Launchpad Free exFAT file system implementation
W: GPG error: http://ppa.launchpad.net oneiric Release: The following signatures were invalid: BADSIG AE6DFF70DAD80779 Launchpad PPA for ubun-Tor
W: GPG error: http://linux.avasys.jp lsb3.2 Release: The following signatures were invalid: BADSIG E5E86C008AA65D56 Seiko Epson Corporation (Epson Inkjet Printer Driver) <epson-linux-inkjet@avasys.jp>
W: A error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: http://security.ubuntu.com oneiric-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>

W: GPG error: http://ca.archive.ubuntu.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com>
W: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/oneiric/Release

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/oneiric-security/Release

W: Some index files failed to download. They have been ignored, or old ones used instead.