sylvia_intel: I now have a second confirmed case (DH87RL mit Dauerton im Standby | Forum - heise online) of someone who has board revision 403 and still stepping C1 (according to CPU-z) of the Southbridge. When will there be a reply from Intel? We have been waiting for months now for an answer. 
I'm about to order a board from Asus (H87M-Pro), who at least have a functioning customer service....