Messed up /etc/apt/sources.list by KPackageKit

[Martin]

Binary package hint: kpackagekit

I'm using KUbuntu 9.10 RC.

While I tried to enter a specific download location in kpackagekit ("Other..."), there didn't popup a window in order to specify the server location, but python died. Now my /etc/apt/sources.list is messed up, i.e. there are no URLs any more (see below).

I'm now unable to do "sudo apt-get update" etc.
How can I fix my sources.list?

Thanks,
Martin

--- snip ---
#
# deb cdrom:[Kubuntu 9.10 _Karmic Koala_ - Release Candidate amd64 (20091020.3)]/ karmic main restricted

# deb cdrom:[Kubuntu 9.10 _Karmic Koala_ - Release Candidate amd64 (20091020.3)]/ karmic main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

deb karmic main restricted
deb-src karmic main restricted

## Major bug fix updates produced after the final release of the
## distribution.
deb karmic-updates main restricted
deb-src karmic-updates main restricted

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.
deb karmic universe
deb-src karmic universe
deb karmic-updates universe
deb-src karmic-updates universe

[...]
--- snip ---

[Jonathan Thomas (echidnaman)]

Reassigning to the software-properties tool KPackageKit launches for sources.list editing.