No, it's on there the right way. The laser detecting dome is in different positions or forms depending on the mission/mechanic/military. It does look weird, but positioning the guidance system at just the right angle allows for shorter distance / higher altitude drops. The GBU-12 kind of zigzags through the air (it intentionally overcompensates how much it needs to move its guidance fins), so the tilting of the dome will make the bomb more efficient and precise. :D

^example:
http://upload.wikimedia.org/wikipedia/commons/a/aa/GBU-10_on_51st_TFW_F-4E_1982.JPEG

As guys said, it's correct ;)

Alright, sorry! :)

Mass-closing resolved issues updated only last year - assuming fixed correctly.

Cheers!