Possible Duplicate:
What is the easiest way to resolve apt-get BADSIG GPG errors?
Unable to load lucid partner packages from archive.canonical.com
When I run:
apt-get update
I get this error:
"W: GPG error: http://archive.canonical.com oneiric Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key "