Hi, There is no reason why a DCC layout would "develop" shorts where a DC layout would not. A short is a physical "bridge" between the two current carrying wires or tracks. It has nothing to do with the electronics used by either system. Random shorting like that described can usually be attributed to sloppy track laying (a mistery nail) or bad wiring. Whather you are using DC or DCC, you have to be very careful that your track and the wiring are first rate.