88015 Mac-User with html skills want

Hi, I have a website which is in HTML 1.0 Strict without any errors looking perfect in FF and IE but not on the MAC. Is there any MAC User arrond to look at the page and tell me why it looks wrong on the mac? I have attached a screen from FF and IE and how it looks at the clients MAC. You'll see there is still a problem with the green header area plus the area where are the language links. I need someone to check the site, the url is [login to view URL] with all mac browsers and tell me, if they are still diffrent looking and what's the problem.