I'm using Ubuntu 12.10 i386. After trying to install Skype, the update manager crashes. I tried to use the console using the commands
sudo apt-get update and
sudo apt-get update -f and always the same. Error 404 with this message
"W: Falhou obter http://archive.canonical.com/commercial-ppa-uploaders/skype/ubuntu/dists/quantal/main/binary-i386/Packages 404 Not Found [IP: 184.108.40.206 80]".
Already tried some of your solutions and already verified PPA. Can't find the problem. Update manager still doesn't work.