Repo Problem (again)

I attempted yesterday to install the Chromium web browser. It said I would have to enable the universe repository to install it. I enabled it and it had to reload the package information. Once it did that, it gave me the following:

Failed to fetch http://es.archive.trisquel.info/trisquel/dists/taranis/Release Unable to find expected entry universe/binary-i386/Packages in Meta-index file (malformed Release file?)
Failed to fetch http://archive.trisquel.info/trisquel/dists/taranis-security/Release Unable to find expected entry universe/binary-i386/Packages in Meta-index file (malformed Release file?)
Failed to fetch http://es.archive.trisquel.info/trisquel/dists/taranis-updates/Release Unable to find expected entry universe/binary-i386/Packages in Meta-index file (malformed Release file?)
Some index files failed to download, they have been ignored, or old ones used instead.

So, I changed all instances of 'universe' in my sources.list to 'extras' as per this forum post: http://trisquel.info/en/forum/repo-problem. Alas, it failed to solve my problem and just gave the same error as stated above. Is there something I'm doing wrong? I'm using Trisquel Taranis 4.0 and so far have been very pleased with it.