While I'm on the subject of retractions, I'm surprised no one has yet discussed the potential fallout on the degrees that are earned en route to the publications.
Retraction Watch just had a posting about a retraction that the authors themselves initiated once they realized that they had reach erroneous interpretations of the data. I'm not sure that a retraction should be called for, but the important matter here is that it was an honest mistake. No fraud was ever intended. Now suppose that that same (erroneous) interpretation was crucial to one or more student's dissertations. Should the dissertations (and therefore the degrees) be retracted? If the students are still around, it should be possible to modify dissertation, but what if the student graduated 5 years ago? 10 years? 20 years?
I have no answers, only questions. I'm sure some hardliners will want degrees revoked. Certainly in the case where a fraud has been committed, that response is appropriate, but what about the innocent mistakes?