Comment 0 for bug 789859

STEPS TO REPRODUCE:
Long way:
1. Install oibaf's mesa PPA using add-apt-repository:
sudo add-apt-repository ppa:oibaf/graphics-drivers
sudo apt-get update
sudo apt-get dist-upgrade
2. Remove this PPA with ppa-purge:
sudo ppa-purge ppa:oibaf/graphics-drivers
3. Add the PPA again using add-apt-repository:
sudo add-apt-repository ppa:oibaf/graphics-drivers

----OR----

Short way:
1. Place the two files "oibaf-graphics-drivers-natty.list" and "oibaf-graphics-drivers-natty.list.save" that are contained in the attached file sources.list.d.tar.gz in /etc/apt/sources.list.d. These are the files that are produced by follwing steps 1. and 2. above.
2. Add the repository again:
sudo add-apt-repository ppa:oibaf/graphics-drivers

RESULT:
The file "/etc/apt/sources.list.d/oibaf-graphics-drivers-natty.list" now contains a third, erroneous line that says "ain", causing "apt-get update" to fail with:
E: Type 'ain' is not known on line 3 in source list /etc/apt/sources.list.d/oibaf-graphics-drivers-natty.list

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: python-software-properties 0.80.9
ProcVersionSignature: Ubuntu 2.6.39-0.5~20110427-generic 2.6.39-rc5
Uname: Linux 2.6.39-0-generic x86_64
Architecture: amd64
Date: Sun May 29 14:20:37 2011
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_DK:en
 LANG=en_DK.UTF-8
 SHELL=/bin/bash
SourcePackage: software-properties
UpgradeStatus: Upgraded to natty on 2011-04-28 (30 days ago)