You're right, Brown is completely ignoring this and hasn't been trying to make this non-issue part of his campaign for the past month. It's all the Boston Globe, who released their report today. Oh wait, here's Scott Brown's website with a posting about this on April 27th. http://www.scottbrown.com/2012/04/warren-must-apologize-for-participating-in-harvards-diversity-sham/
But speaking of facts, it was the Herald that originally broke the story and has been hilariously trying to make a scandal out of this to a) push their political agenda and b) use shoddy journalism to sell papers.