[lubuntu] Upgrade problems with Quantal

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http://ubuntuforums.org – I suppose this is the right place for this new thread. I have recently upgraded from Lubuntu 12.04 to 12.10 beta 1, and now when I try to upgrade to beta 2, I get (both from the Software manager, and from the Terminal) the following messages: Code: W: Failed to fetch http://archive.canonical.com/dists/[distro]/partner/source/Sources  404  Not Found [IP: 80] W: Failed to fetch http://archive.canonical.com/dists/[distro]/partner/binary-i386/Packages  404  Not Found [IP: 80] E: Some index files failed to download. They have been ignore (Hardware)