I'm with Schmange on this one, obviously. Not only does it not make sense to spell any word like that with a t instead of an ed, when would you actually say a word like that and end it in a t? It would be very akward to say stuff like "so last night I dreamt that I was in class and the teacher said I spelt something wrong so I woult lose marks". Maybe it's gramatically accepted in some circles, but it sure as hell ain't in mine!