Hi guys. Hope you can help me with this. On Mint 9 when running Update Manager, I receive the following error message. Any clues?
W: GPG error: http://deb.opera.com stable Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY A201***********
(* = I removed the letters in case it's something I shouldn't be posting)
When I click OK the downloads install normally.