It seems that issue for me was different login names on my Ubuntu One/Launchpad and /etc/apt/auth.conf files (I was changed my Ubuntu One/Launchpad username). After auth.conf login name was corrected apt-get update show no errors.
It seems that issue for me was different login names on my Ubuntu One/Launchpad and /etc/apt/auth.conf files (I was changed my Ubuntu One/Launchpad username). After auth.conf login name was corrected apt-get update show no errors.