Happy Birthday David

Has it been mentioned that the part in David's hair is on a different side in the viral promo and in the trailers? [img]http://www.shoppingblog.com/2012pics/michael_fassbender_david8_robot.jpg[/img] [img]http://4.bp.blogspot.com/-Ac0-dIESHY4/Tu-jQ_E2NNI/AAAAAAAAAQ8/OBTO7EudP2U/s1600/prometheus_teaser_13.jpg[/img] just wondering if it had been suspected as part of the "multiple David androids" theories.