The problem is caused by installing 10.4.3, regardless of whether you are running Motion 2.0 or 2.01, if you have a Decklink card set to "Video Desktop" On.
The temporary solution is to turn off video desktop on you Decklink card. Apple will fix the problem in the OS in a future OS X release and are fully aware of the problem. Indeed, they've been working very hard since I pointed it out to them to come to a solution.
I'm now back up and running in Motion, and can finish my current project.
Graeme
[
www.nattress.com] - Plugins for FCP-X