Display issue on Macbook Air

See the attached image for an issue we're experiencing ONLY with macbook airs.

 The photos need to fill the white box
Those photos fill the white box on all browsers. This issue is only with Firefox on an Air.

They had FF 3 and the issue was there. They upgraded to FF 4 and it is still there. It looks fine in Safari.

The resolution they have is 1440 x 900.

To see a working version go to www.fitwoman.com

Anyone ever seen this before or know how to fix it?
Who is Participating?
Try updating the flash player for your MAC Air. Go to to the Adobe website  for the lastest version of the Flash Player.

Good Luck!
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