Select 'Internet Explorer 9.0' and try the site again from Safari.
Looks like this (example is from Safari 5.1.8 but it's similar in v6.05-you'll have a few more choices): In Safari Preferences > Advanced, check the box, 'Show Develop menu in menubar.' The item will immediately appear. The last version of IE Mac was released close to ten years ago and cannot even render these forums properly.