everyone was just overly worried about new forms, they have to update the form because of legislation on the gender (X is now allowed as a legal gender). They will not reject simply because you are using an older form, they may return it and ask you to send in updated one but not reject totally. If you look at last year thread not a single person got completely rejected due to old form, missing docs etc, some even missing signature but they only send a request to resubmit and not completely return the whole file