cameronc@ubuntu:~$ sudo apt-get update
Ign http://archive.ubuntu.com quantal InRelease
Ign http://security.ubuntu.com quantal-security InRelease
Ign http://archive.ubuntu.com quantal-updates InRelease
Hit http://repo.steampowered.com precise InRelease
Get:1 http://security.ubuntu.com quantal-security Release.gpg [933 B]
Hit http://archive.ubuntu.com quantal Release.gpg
Get:2 http://security.ubuntu.com quantal-security Release [49.6 kB]
Hit http://repo.steampowered.com precise/steam Sources
Get:3 http://archive.ubuntu.com quantal-updates Release.gpg [933 B]
Hit http://archive.ubuntu.com quantal Release
Get:4 http://archive.ubuntu.com quantal-updates Release [49.6 kB]
Ign https://private-ppa.launchpad.net quantal InRelease
Hit https://private-ppa.launchpad.net quantal Release.gpg
Hit https://private-ppa.launchpad.net quantal Release
Fetched 101 kB in 1s (73.0 kB/s)
W: Failed to fetch http://repo.steampowered.com/steam/dists/precise/InRelease  Unable to find expected entry 'steam/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/quantal-security/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/quantal/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/quantal-updates/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

W: Failed to fetch https://private-ppa.launchpad.net/commercial-ppa-uploaders/steam64/ubuntu/dists/quantal/Release  Unable to find expected entry 'main/binary-1386/Packages' in Release file (Wrong sources.list entry or malformed file)

E: Some index files failed to download. They have been ignored, or old ones used instead.