[ubuntu-za] Continual error message in top right screen

[Andre Rossouw]

The clue:

W: An 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 precise Release: The following signatures were invalid: BADSIG 16126D3A3E5C1192 Ubuntu Extras Archive Automatic Signing Key

The key on your machine is invalid for whatever reason. Delete it and put it back. GPG keys are available, if I recall correctly, keyserver.ubuntu.com

You may need to consult google for exact instructions, I'm not typing an essay from my phone ;)

Andre