Lightbox - image too large?

Heya,

Hope it's okay I double post, but It's both a css and lightbox related problem.

In short terms, the lightbox is too big and expanding at the bottom of the page - could it be something with a overlay property or anything?

Example can be seen here (just click on of the images):

http://amex-trading.dk/?dir=Storkoekkenudstyr/Kombi-ovne

Hope it's okay I double post, but It's both a css and lightbox related problem.
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