Fixing BADSIG 40976EAF437D05B5 in Ubuntu
The problem:
W: GPG error: http://archive.ubuntu.com jaunty-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <ftpmaster@ubuntu.com> W: You may want to run apt-get update to correct these problems
How to fix it:
sudo aptitude -o Acquire::http::No-Cache=True -o Acquire::BrokenProxy=true update
