Hi George,
We’re waiting on a copy of Aperture to test this problem and we should receive it any day now. In the meanwhile, can you please go in to the DeckLink PrefPane, disable the video desktop and restart your Mac. Now see if Aperture works without crashing. Please let us know as it would be very helpful to know if this works around the problem. Disabling the DeckLink desktop will still enable you to output to a broadcast monitor from Shake and other video applications. I think the crash you are seeing is an OpenGL-related problem introduced in Mac OS X 10.4.3. If my guess is correct, then disabling the DeckLink desktop will work around this issue while it continues to be investigated by Apple and Blackmagic Design.
Regards,
Luke Maslen
Blackmagic Design