Failed to download repository information (related topics did not seem to answer my question)

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http://askubuntu.com – W:Failed to fetch http://archive.ubuntu.com/dists/pangolin/main/binary-i386/Packages 404 Not Found [IP: 80] , W:Failed to fetch http://archive.ubuntu.com/dists/pangolin/universe/binary-i386/Packages 404 Not Found [IP: 80] , E:Some index files failed to download. They have been ignored, or old ones used instead. I am running 12.04 x86, but when I check the sources.list file, there is nothing in there that seems to reference anything i386 (but the error spits out 'i386' as part of the repo url). I think it has to do with my above setup, because I am choosing t (HowTos)