safari iframe problem

I'm having a problem getting iframes to display in safari on the mac. I'm using a CMS (typo3) to control the page so it may be a problem with this. but when i look at the code for the page it looks fine and so i dont think it is that. the page is at http://www.bingo.qck.com/compare-cards.html does anyone know why they arent displaying and how to fix it?

I realise my last posing may be a bit vague so I'm going to try and be morse specific. The problem is still the fact that the irame I'm trying to include in the page won't appear on safari web browsers (that i've tried), although it apears in the code. The page is structued using div's and a css.

There are three main sections top (tab navigation) middle (content) and footer. The middle area is made up of three other sections (left, middle, right). The left and right div's are floated, left and right and the middle one sits nicely in the middle, this is all done using an external css. The iframe is contained in the middle div and displays a local html file.

Does anyone have any idea why if won't display even though code is present, or its just the computer i've looked at. The url for the page is http://www.new.qck.com

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Personal Financial portal - www.qck.com
Business sale report - www.business-sale.com