devi correggere la riga perche hanno cambiato struttira del
server

metti cosi

deb http://http.us.debian.org/debian/ experimental main contrib non-free

oppure cosi

deb http://linux.iq.usp.br/debian/ ../project/experimental-is-in-dists-now main contrib non-free



per marillat devi reimportare le key

gpg --keyserver hkp://wwwkeys.eu.pgp.net --recv-keys 1F41B907

gpg --armor --export 1F41B907 | apt-key add -


da root