This site takes advantage of features found in current browsers. It may not render as well in older browsers.
Here is a list of recommended minimum versions for your browser—

Windows

• Chrome Version 10
• Firefox Versions 3.6 and 4
• Internet Explorer Versions 9 and 10
• Opera Version 11.1
• Safari Version 5

Mac

• Firefox Version 4
• Opera Version 11.1
• Safari Version 5

You should be able to use all the features of the web with earlier browser versions, but be aware that some formatting and graphics may not be displayed as you would optimally.

In addition to aesthetics, you should be aware that earlier browser versions may be more susceptable to malware.