Christoph: The 40 ft cars that were a surprise (at least to me) announcement a month or so back.
Mike: About the only cars I've bought recently that had MT trucks were from FVM, and you're right, they were MT trucks and wheels. It seems that when MT redesigned their wheels the last time the axles were shortened, because I tried the wheels in older sideframes and they fell out of them as well. Old MT and Precision Masters wheels fit the FVM trucks perfectly.
On the other hand, the wheels in my MT 60 ft boxcar stay in fine, making me wonder if that truck also is a newer design.