Comment 10 for bug 854841

This bug is NOT fixed yet!

I am getting:

W: Duplicate sources.list entry http://ppa.launchpad.net/xxxxx oneiric/main amd64 Packages (/var/lib/apt/lists/ppa.launchpad.net_xxxxx_dists_oneiric_main_binary-amd64_Packages)
W: Duplicate sources.list entry http://ppa.launchpad.net/xxxxx/ubuntu/ oneiric/main i386 Packages (/var/lib/apt/lists/ppa.launchpad.net_xxxxx_dists_oneiric_main_binary-i386_Packages)
W: You may want to run apt-get update to correct these problems

After running sudo apt-get update, this problem is not resolved.

lsb_release -a
LSB Version: core-2.0-amd64:core-2.0-noarch:core-3.0-amd64:core-3.0-noarch:core-3.1-amd64:core-3.1-noarch:core-3.2-amd64:core-3.2-noarch:core-4.0-amd64:core-4.0-noarch
Distributor ID: Ubuntu
Description: Ubuntu 11.10
Release: 11.10
Codename: oneiric

grep -Ri launchpad* /etc/apt/sources.list
deb http://ppa.launchpad.net/steubens/transmission-proxy-support/ubuntu natty main
deb-src http://ppa.launchpad.net/steubens/transmission-proxy-support/ubuntu natty main
deb http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu oneiric main
deb-src http://ppa.launchpad.net/gnome3-team/gnome3/ubuntu oneiric main
(seems like some are not listed here)

Corrective measure needed:
Implement a check to see if any PPA was already added prior to adding it to the system.