See the update to Instapundit's post on the matter; Howard Kurtz emails to correct the "misimpression" that the report has susbstantiated the Newsweek story.
Thanks to the National Journal's Blogometer.
Update: So, the Newsweek story was unconfirmed. Oddly enough, it turns out that the story about those 15-17 Afghans killed in the riots was unconfirmed, too, although the MSM (and bloggers, too) ran with it.
LGF asks: where are the bodies? And no one seems to be producing them.