Hi,
First I upgraded my Color to version 1.0.2 from the Apple Updates. Then I got my hands on the beta drivers Matrox has available on their user forum.
Once both we updated, from FCP I selected “Send To…Color”
Within Color I selected the “uncompressed 1080i” option for the MXO.
I was working in HDV within FCP, however, the Color project settings are set to, I think FCP does this themselves, 1920×1080, when I found that out, I had no more aspect issue like I had when I selected an HDV video out within Color.
Ace