unless it's a major mistake, most publications don't really publicize corrections (especially not with blogs being able to edit their content.) UPDATE
"Update: Regarding Evan Williams’ statement here [link to http://twitter.com/ev/statuses/801530348], all I can say is that multiple sources claim that Twitter is telling people they are planning on moving away from Ruby on Rails. This is not the first time a company has denied something that has turned out to be 100% true."