The latest issue of Smithsonian magazine arrived a few weeks back, sprinkled with several pieces of interesting writing, as usual. One of them announced an exhibit at the San Francisco Museum of Modern Art, titled "Don't! Photography and the Art of Mistakes." I know you're distracted now by a strange sensation of familiarity. And your emotions are justified. You likely recall my exhibition "Accidental Abstraction" from March that celebrates the beauty of photographs from Ital