Can't get rid of precise-proposed

[Helmut Schneider]

Hi,

I played around with sources.list and added an entry for
precise-proposed. After understanding "proposed" I removed the entry.
But I'm still offered proposed packages. How do I get rid of it?

Thanks, Helmut

###### Ubuntu Main Repos
deb http://de.archive.ubuntu.com/ubuntu/ precise main restricted
universe multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ precise main restricted
universe multiverse

###### Ubuntu Update Repos
deb http://de.archive.ubuntu.com/ubuntu/ precise-security main
restricted universe multiverse
deb http://de.archive.ubuntu.com/ubuntu/ precise-updates main
restricted universe multiverse
#deb http://de.archive.ubuntu.com/ubuntu/ precise-proposed main
restricted universe multiverse
deb http://de.archive.ubuntu.com/ubuntu/ precise-backports main
restricted universe multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ precise-security main
restricted universe multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ precise-updates main
restricted universe multiverse
#deb-src http://de.archive.ubuntu.com/ubuntu/ precise-proposed main
restricted universe multiverse
deb-src http://de.archive.ubuntu.com/ubuntu/ precise-backports main
restricted universe multiverse

###### Ubuntu Partner Repo
#deb http://archive.canonical.com/ubuntu precise partner
#deb-src http://archive.canonical.com/ubuntu precise partner

###### Ubuntu Extras Repo
#deb http://extras.ubuntu.com/ubuntu precise main
#deb-src http://extras.ubuntu.com/ubuntu precise main

helmut at ubuntu:~$ dpkg -l | grep postfix
helmut at ubuntu:~$ sudo aptitude show postfix
Package: postfix
State: not installed
Version: 2.9.3-2~12.04.2
[...]
helmut at ubuntu:~$ sudo apt-get changelog postfix
postfix (2.9.3-2~12.04.2) precise-proposed; urgency=low
[...]
helmut at ubuntu:~$