I have a new Mac Pro with Decklink Extreme HD card and when playout to tape there is no consistency. In other words, when I set the in point to tape on 00:00:30:00, CS6 will playout to 00:00:29:08, or sometimes any other frame close to that, but never the right in point to tape. I have tested the same machine and card with FCP7 and it works perfect!
I have the latest 9.5.1 driver installed but that does not seem to help, and Blackmagic does not reply to my mails…. this is immensely frustrating for me!!!