http://picasaweb.google.com/102542760950977079734/StarWarsSpecialEditionChangesHD#5664511987029653394
My guess was they shifted the shot and zoomed in the beginning. But alternative take is a possibility. Go to 1:47:00 on the WGv2. Luke says 'This is Red 5, i'm going in.' but the actual shot has dialog 'Luke pull up!'. (shot 1801/1818)