I've the same problem here with my fully-updated Natty. Each option is
displayed twice. Also, the second option of each pair can't be checked
or unchecked.
And, like #2, I've a None option which I don't know what is, and I can't
check it.
I attach an screenshot to illustrate the problem.
**
** Attachment added: Screenshot of the issue
https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/769364/+attachment/2086090/+files/Pantallazo-Or%C3%ADgenes%20del%20software.png
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For your reference, this is the contents of my /etc/apt/sources.list
file. Also, /etc/apt/sources.list.d directory is empty.
** Attachment added: /etc/apt/sources.list
https://bugs.launchpad.net/ubuntu/+source/software-properties/+bug/769364/+attachment/2086094/+files/sources.list
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You
*** This bug is a duplicate of bug 768469 ***
https://bugs.launchpad.net/bugs/768469
** This bug has been marked a duplicate of bug 768469
duplicate entries in the updates section with python-apt-common
0.7.100.3ubuntu5 upgrade
* You can subscribe to bug 768469 by following this link:
** Attachment added: screenshot of software-sources window
https://bugs.launchpad.net/bugs/769364/+attachment/2083859/+files/Software%20Sources_018.png
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Same problem with the KDE frontend (see the screenshot in attachment).
See http://paste.ubuntu.com/597838/, there are two natty-security, two
natty-proposed, two natty-updates with the same name and the same
description, the only differences are the field RepositoryType (deb-
src).
