I'm having the issue documented here: http://forums.adobe.com/thread/445594
When I try to open a FDF, I just get a pop up over and over again which asks me if I want to open the form.
One possible solution is downgrading to Safari 3, but that is not proven to work.
I thought maybe I could get the FDF to open in FireFox, but changing the default browser does not affect Reader, it still attempts to open the FDF in Safari (strange).
So, does anyone know of a way to open this form?