i added mozilla daily PPA from their launchpad page (in "Software Sources") and then tried to update system. I got "Requires installation of untrusted packages"
1) when i try to refresh package lists i got "W: GPG error: http://ppa.launchpad.net maverick Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EF4186FE247510BE"
2) I'm on company network behind firewall (only ports 443, 80 are open) so package managers cannot connect to keyservers to chceck keys
same problem happened to me in maverick ...
i added mozilla daily PPA from their launchpad page (in "Software Sources") and then tried to update system. I got "Requires installation of untrusted packages"
1) when i try to refresh package lists i got "W: GPG error: http:// ppa.launchpad. net maverick Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY EF4186FE247510BE"
2) I'm on company network behind firewall (only ports 443, 80 are open) so package managers cannot connect to keyservers to chceck keys