When I press the button "check" to find updates, I always get this error:
Failed to get information from repository
W:Failed to fetch http://ppa.launchpad.net/dylanmccall/ppa/ubuntu/dists/precise/main/source/Sources 404 Not Found, W:Failed to fetch htp://ppa.launchpad.net/dylanmccall/ppa/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found, W:Failed to fetch http://ppa.launchpad.net/dylanmccall/ppa/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found, E:Some index files failed to download. They have been ignored, or old ones used instead.
I've noticed that sometimes, in the update manager configuration, there's the same Mexico server instead of Spanish, but if I use the Spanish server, the problem persists.
... And yes, I removed one of the links to be able to post as a new user. (htp = http)