Re:Modern Humans and Neaderthal didn't interbreed (Score 1)

No. Having a common ancestor means that there is an another reason for their sharing some genetic information. It doesn't mean that they didn't ALSO interbreed. One does not preclude the other. Wolves, coyotes and dogs share a common ancestor, and yet can and do occasionally breed. Follow up more of what Svante Pääbo says on the subject and you'll discover that he DOES believe that it is possible that Nenderthals and Homo Sapiens may have interbred.