The backlash starts here. Audiences and juries from Sundance to Cannes and critics from IndieWire to the New Yorker's Anthony Lane love comic book artist Harvey Pekar and the ambitious, multi-layered Harvey-mentary "American Splendor" -- except for your guide Jürgen, who takes a page out of Harvey's book to grumble and moan about the movie, starring Paul Giamatti and Hope Davis. "American Splendor" opens tomorrow in New York, L.A., and Cleveland.