I have not had any luck trying to use 1280x720 and 4:2:2. I keep getting card errors so it could be my Class 6 card but I don't think that is it.
I have been able to get 1440x1080 with 4:2:2 to work but it is unstable.
Same here, but I tried a class 10 card also, although I guess it wasn't the best class ten card so I'll be trying again tomorrow.