Yup, Millions Colors + and alpha channel selected.
I have been rendering with Make Preview and saving the movie straight from QT. Am I supposed to use Render Preview for final quicktime output? I read another post on the same issue and the advice was to render to picture viewer and it worked for that particular person. But I dont understand how picture viewer would work for a movie. Could someone just give me the steps they take to ensure that the alpha is rendered? Thanks