Comment 4 for bug 575856

Tested with 0.4.8.9. After Step 1 is all OK.... After Step 2 I get this warning:

W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ lucid-security/universe Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_lucid-security_universe_binary-i386_Packages)
W: Duplicate sources.list entry http://security.ubuntu.com/ubuntu/ lucid-security/multiverse Packages (/var/lib/apt/lists/security.ubuntu.com_ubuntu_dists_lucid-security_multiverse_binary-i386_Packages)
W: È consigliato eseguire "apt-get update" per correggere questi problemi

How to reproduce after a FRESH install of Ubuntu 10.04 LTS:

Step 1:
Google Repository tweak
Additional repos (Getdeb, Medibuntu, etc.)

Step 2:
Extra Themes
VLC
Thunderbird
Codec
Ubuntu-Tweak
Deluge
CCSM & plugins
Skype
Google Chrome
Google Earth

Attached screenshots and sources.list, before and after using Ubuntu Start.