I’m using AE & Premiere CS5.
1) You are right! 872×480 PAR 1.00 looks like 720×480 PAR 1.2121. Now I really don’t understand when I should use 854×480. Could you help me?
2) Ok, I’ll use .tiff in future. And… what about using .rpf? Please note that I need alpha channel… Is it supported?