[nq:1]The New Yorker routinely uses diaeresis (diaereses?) in its copy. It strikes me as non-standard, but is it wrong? Is ... a comeback or merely a house style affectation peculiar to this magazine? Do other AmE publications go in for it?[/nq]
I thought it was standard in the US; I've seen it (eg. coöperation) in US school textbooks.
Adrian