I suppose I have to ask why you care? Do you want to be a pro Graphic Artist and CS3 just doesn't have all the bells and whistles you need to make you even faster? My guess is you don't know half the shit that CS3 does. This isn't a graphic arts forum and if it was this answer would be different, but being as this is a marketing forum....
The real question is to make shitty looking ads that convert do you need anything more then paint?
I think good marketers can make ads in paint then someone could with the latest greatest software. Spend your time on reading books, studying ads and testing. More new software to play with is just a waste of time.
Just my 3 cents.