On his “Movie Nation” blog, Boston Globe critic Ty Burr responds to my 12.5 rant about the sub-standard sound and projection of Sweeney Todd at the AMC Leows’ Boston Common two days ago. He agrees for the most part and provides some historical perspective on the Boston exhibition scene. My only disagreement is that he felt that Tim Burton‘s “gloomy, diseased color scheme” couldn’t have been affected all that adversely by the weak projector lamp — “what’s the difference between perfect and imperfect murk?” Due respect but no — gloomy images need strong illumination more than any other kind.