It's a bit of a concern going forward. If certain ports don't work now on 06-08 models and Apple's position is that they've never supported the card on those systems, could we get left high and dry with a future update? What's to stop the DVI port from working in the future?
Unless this is a driver issue and an image / swapped hard drive from the 10's is placed into an 06 - 08 model fixes the problem, it seems to infer that there is indeed some hardware config somewhere that's different enough to cause problems.
Maybe it's something to do with HDCP? Perhaps the video signal for the MDP's is routed through some extra circuitry not present on the earlier models? Isn't MDP meant to be HDCP compliant and DVI not?
Of course, I have no idea what I'm talking about or whether what I just wrote makes any sense whatsoever....Just throwing it out there
Bloomin' Apple.....Just when we thought they were throwing us a bone....