Photo wonks about. Why?

can you help?
When the background jpeg loads up, it wonks slightly to the side, why is this, any ideas? I have done two versions, one split into three the other not.

ermm… I don’t see anything wrong :-\

Is there a .jpg that gets dynamically loaded with this?

All I see is a grey background with a white bar on the top and bottom and under the bottom one is the navigation (which does nothing except the rollover effect)