I regret to announce that Joo Churlsoo has suddenly withdrawn all four of his draft SRFIs (182, 183, 184, and 187), citing slights he perceived in the SRFI 183 discussion, in interaction with this editor, and elsewhere.  I have reviewed all these interactions carefully and, I believe, honestly, and have found nothing but reasonable discussion and feedback by all the participants.  Alas, I was not able to persuade Joo to change his mind.