[ubuntu] 12.10 update manager fails

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http://ubuntuforums.org – I tried to check for updates and got the following: ------------------- Failed to download repository information Check your Internet connection. W:Failed to fetch http://ppa.launchpad.net/libv4l/ppa/...-i386/Packages 404 Not Found , E:Some index files failed to download. They have been ignored, or old ones used instead. ----------------- The internet connection is OK (Hardware)