17 Jan How to address a small duplicate content issue? by Matt Cutts
If you had to deal with short term duplicated content on a new site (perhaps publishing a story on two different URLs over one day), what would you do in order to avoid any penalty from a duplicate content filter?
So, I am assuming this white hat, high quality new publisher and you have short duplicate content that you really don’t wanna have but there a shooting or something on breaking news, one thing you can really do is use rel=cananocal tags because even if you have multiple copies of a short story you will be dividing the page rank between those multiple stories.
See the Video : http://www.youtube.com/