On a day Disney (DIS) hit an all-time high ahead of a winter blizzard  Snow White and the Seven Dwarfs was about right. Helped by the House of Mouse  Dow Industrials (^DJI) advanced 7.22 and if this morning’s upgrade of Yahoo (YHOO) is any indication Marissa Mayer’s Cinderella similarly looks set for a long run. The Post Office abandoned Saturday delivery for the first time since 1863 which won’t impact many in our increasingly electronic age but might put one billionaire in a spot of bother. (Truth be told Buffett has had better weeks.)   A downgrade of DreamWorks (DWA) sent the studio behind Flushed Away slumping 3.79% and President ...