This is morning I heard a newscaster deliver the line, "None of the injuries is life-threatening." I think it should have been, "None of the injuries are life-threatening." Of the two, which do you think is correct?
I'm not one to make should statements. It could be "is" and it wouldn't be wrong, that's what I'll say. But the plural is more common in modern English when you can replace "none" with "no persons" or "no things" and thus the plural would probably be more common here.