We've got nothing against Internet Explorer, but for whatever reason, Microsoft refuses to support some of the modern styling standards. Until we have time to develop a workaround, the pages look much better in Mozilla Firefox or Google Chrome.
These free browsers are faster and to some degree offer better security, more features, and a host of plugins. The choice is yours, but the pretty top banner and the rounded corners on the main menu tabs and buttons and a few other things just aren't aren't syled nicely in IE. All the content is there, just speed and aesthetics are affected.